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IRS ST16 Notice: What It Means and Why You Shouldn’t Ignore It

Silas Bamigbola avatar image
Last updated 11/01/2024 by
Silas Bamigbola
Fact checked by
Ante Mazalin
Summary:
The IRS issues an ST16 Notice when it plans to begin collection actions for unpaid taxes. This happens after the taxpayer fails to respond to earlier notices. The ST16 Notice signals that the IRS has not received the required tax payments or returns. The taxpayer must act quickly to avoid enforcement actions such as wage garnishment, tax liens, or other penalties.
An IRS ST16 Notice can be a serious warning. It shows the IRS is ready to take action to collect unpaid taxes or address missing tax returns. By the time this notice arrives, the IRS has likely made several attempts to resolve the issue. Immediate action is necessary to prevent severe penalties. Understanding the notice and knowing what steps to take can help avoid further consequences.
Struggling with IRS notices? If you’ve received an IRS letter and aren’t sure how to handle it, you might want to explore professional tax relief options. Optima Tax Relief has helped thousands of people resolve their tax issues and get back on track with the IRS. Learn more about how they can assist you with your situation.

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What is the IRS ST16 Notice?

The IRS ST16 Notice is an official alert that the IRS may soon take steps to collect unpaid taxes. The IRS typically sends this notice after a taxpayer fails to respond to earlier warnings about tax debts or missing returns. The ST16 Notice urges the taxpayer to act immediately to prevent legal or financial consequences.
This notice includes the amount owed, the tax period involved, and what the IRS plans to do to collect the debt. Actions may include wage garnishment, property liens, or bank account levies. Ignoring the ST16 Notice can result in more serious actions, so it’s essential to respond right away.

Why did you receive an IRS ST16 Notice?

There are several reasons for receiving an IRS ST16 Notice:
  • You owe unpaid taxes from a previous year or years.
  • You haven’t filed one or more required tax returns.
  • The IRS tried to contact you multiple times, but you didn’t respond.
  • There may be discrepancies between your reported income and the income reported by employers.
In any case, the ST16 Notice shows that the IRS is about to begin collection actions. Immediate steps are needed to resolve the issue.

Pro Tip

Set up a payment plan with the IRS as soon as possible if you cannot pay the full amount owed. This can help you avoid more severe collection actions like wage garnishment or asset seizure.

The impact of the IRS ST16 Notice

Receiving an IRS ST16 Notice signals that the IRS is ready to escalate collection efforts. Ignoring this notice can lead to serious financial consequences, such as:
  • Wage garnishment: The IRS may instruct your employer to withhold part of your paycheck to cover the tax debt.
  • Tax liens: The IRS can place a lien on your property, making it difficult to sell or refinance.
  • Bank levies: The IRS can withdraw funds directly from your bank account to pay the debt.
  • Seizure of assets: In extreme cases, the IRS may seize personal or business assets to satisfy tax obligations.
The IRS takes collection actions seriously. It’s vital to respond quickly and address the notice to avoid these outcomes.

How to respond to an IRS ST16 Notice

Taking immediate action after receiving an IRS ST16 Notice is critical. Ignoring it will worsen the situation. Here’s what you need to do:

Steps to take when responding to the IRS ST16 Notice

  • Read the notice carefully: Understand the reason for the IRS’s action. The notice will show the amount owed and the tax periods involved.
  • Check your records: Review your tax filings to ensure there are no errors. Confirm if the IRS’s claim is accurate.
  • Contact the IRS: If you believe the notice is incorrect or need more information, call the IRS immediately. The notice usually provides a contact number.
  • Pay the amount owed: If you agree with the IRS, arrange to pay the debt. The IRS offers installment plans if you can’t pay the full amount at once.
  • Seek professional help: For complex situations, consider consulting a tax professional or attorney for guidance.

What happens if you ignore the IRS ST16 Notice?

Ignoring an IRS ST16 Notice can lead to severe consequences. The IRS can garnish wages, place liens on property, or seize bank account funds. The longer the debt remains unpaid, the more penalties and interest accumulate, increasing the amount owed. Acting quickly helps avoid these outcomes.

Pro Tip

Always respond promptly to any IRS notice, even if you believe it was issued in error. Timely communication can prevent enforcement actions and give you more options to resolve the issue.

How to avoid future IRS ST16 Notices

To avoid receiving an IRS ST16 Notice in the future, it’s important to stay on top of your tax obligations. Here are a few tips:
  • File your taxes on time: Make sure you file all required tax returns by the due date, even if you cannot pay the full amount owed.
  • Pay your taxes: If you owe taxes, try to pay the amount due by the filing deadline. If you can’t, set up an installment plan with the IRS.
  • Keep accurate records: Make sure to keep detailed records of your income, deductions, and any payments made to the IRS.
  • Respond to IRS notices: If you receive any other IRS notices before the ST16, respond promptly to resolve issues before they escalate.

Pro Tip

Consult a tax professional if you’re unsure how to proceed. An expert can help you navigate the complexities of tax debt, ensuring that you meet deadlines and avoid additional penalties.

Disputing the IRS ST16 Notice

If you believe that the IRS ST16 Notice was issued in error, it’s crucial to dispute the notice as soon as possible to avoid any further collection actions or penalties. Disputing the notice requires a clear understanding of your tax situation and the ability to provide accurate documentation to support your case. Here’s how to effectively handle a dispute.

Review the IRS ST16 Notice carefully

The first step in disputing the IRS ST16 Notice is to thoroughly review the notice to understand why it was issued. The notice will provide details about the tax periods involved, the amount the IRS claims is owed, and the steps the IRS plans to take to collect the debt. Compare this information with your own tax records to identify any discrepancies. Pay special attention to whether the taxes in question were paid, if there were any filing errors, or if the IRS may have received incorrect information from third-party sources like employers or financial institutions.

Gather supporting documentation

Once you’ve identified the area of dispute, the next step is to gather all necessary documentation that supports your claim. This could include:
  • Copies of previous tax returns that were filed for the periods in question.
  • Receipts or proof of tax payments made during the disputed period.
  • Letters or communications from employers, banks, or financial institutions verifying the correct amounts reported to the IRS.
  • Any corrected tax forms, such as amended returns or W-2/1099 forms that show accurate information.
This documentation will serve as evidence to prove that the amount claimed by the IRS is incorrect.

Contact the IRS to initiate the dispute

After gathering your documentation, contact the IRS directly to initiate the dispute. The notice will provide a phone number or address to reach the correct department. Be prepared to explain your situation in detail and provide copies of the supporting documents. It’s often helpful to send all documents via certified mail to ensure that the IRS receives your dispute package and you have proof of submission.

Request a review or appeal

If your initial contact with the IRS does not resolve the issue, you may have the option to formally request a review or file an appeal. The IRS offers a structured appeal process where you can argue your case before an independent office within the IRS. This process involves submitting a formal written request and providing any additional evidence to support your dispute. Be sure to follow the specific instructions provided by the IRS for appeals and adhere to any deadlines outlined in the ST16 Notice.

Consider professional assistance

Disputing an IRS ST16 Notice can be complex, especially if large amounts of taxes or multiple tax years are involved. In such cases, it may be beneficial to seek help from a tax professional, such as a Certified Public Accountant (CPA) or tax attorney. These professionals can represent you before the IRS, help you prepare your dispute, and ensure that your rights as a taxpayer are protected. Additionally, tax professionals can often expedite the resolution process and increase the likelihood of a favorable outcome.
Looking for the best way to reduce your tax burden? We’ve compiled a list of the Best Tax Relief Companies to help you navigate tax challenges and save money. Click here to discover trusted experts who can assist you with tax resolution, IRS negotiations, and more!

Frequently asked questions

What should be done immediately after receiving the IRS ST16 Notice?

After receiving an IRS ST16 Notice, it is important to read it thoroughly and understand why it was issued. The next step is to verify tax records to confirm whether there are unpaid taxes or unfiled returns. Contacting the IRS to clarify any uncertainties or errors is crucial. Prompt action should be taken to either pay the outstanding balance, file the required returns, or dispute the notice if there is an error.

Can the IRS ST16 Notice be appealed or disputed?

Yes, the IRS ST16 Notice can be disputed if it was issued in error. Taxpayers who believe that they do not owe the amount stated or that the notice is incorrect should contact the IRS immediately. Providing supporting documentation that demonstrates an error, such as proof of prior payments or filed returns, is necessary when disputing the notice. It’s recommended to respond as quickly as possible to avoid further collection actions.

What payment options are available when paying the tax owed?

The IRS offers several options for paying the tax owed as indicated in the ST16 Notice. These include paying the full amount upfront, setting up an installment agreement, or applying for an Offer in Compromise if the taxpayer cannot afford to pay the full amount. It is advisable to contact the IRS directly to arrange a suitable payment plan or explore options based on the taxpayer’s financial situation.

What penalties can be expected if no response is given to the IRS ST16 Notice?

Failure to respond to an IRS ST16 Notice can lead to severe penalties. The IRS may garnish wages, levy bank accounts, or place liens on property. In addition to collection actions, penalties and interest will continue to accumulate on the unpaid balance. Ignoring the notice could also affect future tax filings and credit scores. Therefore, responding as soon as possible is crucial to mitigate these potential penalties.

How long does it take for the IRS to take collection actions after sending the ST16 Notice?

The timing of IRS collection actions can vary. However, once the ST16 Notice is issued, the IRS is signaling its intention to begin collection processes soon if no action is taken by the taxpayer. Taxpayers are usually given a window of time to respond to the notice before enforcement actions like wage garnishment or bank levies are initiated. Immediate action should be taken to resolve the issue before collection efforts escalate.
Need help understanding other IRS letters and notices? Visit our comprehensive guide to IRS Letters and Notices or search for the document you received in the table below.
IRS Letter or Notice Number
Notice Description
CP01The IRS verified your claim of identity theft and will monitor your account.
CP01HThe IRS received a tax return with a social security number that belongs to a dead person.
CP02HMoney is due on an amended return based on a grant received due to Hurricane Katrina, Rita, or Wilma.
CP03CYou received the First-Time Homebuyer Credit for a house you purchased.
CP04You may be eligible for tax deferment because either you or a spouse served in a combat zone, a qualified contingency operation, or a hazardous duty station during the tax year specified on your notice.
CP08You may be entitled to additional money due to the Additional Child Tax Credit.
CP10Your tax return changed due to a miscalculation, and the refund you wanted to apply to an estimated tax payment has changed.
CP10AYour tax return changed due to a miscalculation of the Earned Income Credit, and the refund you wanted to apply to an estimated tax payment has changed.
CP11You owe money because the IRS amended your return due to a miscalculation.
CP11AYour tax return changed due to a miscalculation of the Earned Income Credit, and the refund you wanted to apply to an estimated tax payment also changed.
CP11MYour tax return changed due to a miscalculation of the Making Work Pay and Government Retiree Credit, and the refund you wanted to apply to an estimated tax payment has changed.
CP12You are due a bigger refund because the IRS corrected one or more mistakes on your tax return.
CP12AThe IRS made changes to correct the Earned Income Credit (EIC) claimed on your tax return.
CP12E or CP12FThe IRS corrected a miscalculation on your return.
CP12MThe IRS made changes to the computation of the Making Work Pay and/or Government Retiree Credits on your return.
CP12RThe IRS made changes to the computation of the Rebate Recovery Credit on your return.
CP13The IRS made changes to your return due to a miscalculation. There is no refund or amount due. Your balance is zero.
CP13AThe IRS made changes to your return due to a miscalculation of the Earned Income Credit. There is no refund or amount due. Your balance is zero.
CP13MThe IRS made changes to your return due to a miscalculation of the Making Work Pay credit or the Government Retiree Credit. There is no refund or amount due. Your balance is zero.
CP13RThe IRS made changes to your return due to a miscalculation of the Recovery Rebate Credit. There is no refund or amount due. Your balance is zero.
CP14You owe money on unpaid taxes.
CP16The IRS made changes to your return due to a miscalculation. The refund you were due was applied to other tax debts.
CP21AYou owe money due to the changes you requested that the IRS make on your tax returns.
CP21BYou are due a refund due to the changes you requested that the IRS make on your tax returns. The money should arrive within 2 to 3 weeks.
CP21CThe IRS made the requested changes to your tax return. You will not receive a refund, and there is no tax due. Your balance is zero.
CP21EAs a result of your recent audit, the IRS made changes to your tax return, and you owe money as a result of those changes.
CP21IThe IRS made changes to your tax return relating to the Individual Retirement Arrangement (IRA) taxes. You owe money due to the changes.
CP22AThe IRS made the changes you requested, and you owe money as a result.
CP22EAs a result of your recent audit, the IRS changed your tax return, and you now owe money.
CP22IThe IRS made changes to your tax return relating to the Individual Retirement Arrangement (IRA) taxes. You owe money due to the changes.
CP23The IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. You owe taxes due to these changes.
CP24The IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. This resulted in an overpayment of estimated taxes.
CP24EThe IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. This resulted in an overpayment of estimated taxes.
CP25The IRS changed your return because there was a difference between the amount of estimated tax payments listed on your tax return and the amount actually posted to your account. You are not due a refund, nor do you owe any money. Your balance is zero.
CP31You need to update your address because your refund check was returned to the IRS.
CP45The IRS was unable to apply your overpayment to your estimated tax as you requested.
CP49The IRS used all or part of your refund to pay a tax debt.
CP53Your refund check will be sent by mail because the IRS can’t provide your refund through direct deposit.
CP57The bank declined your payment, so the IRS was unable to draft funds from your bank account.
CP71A reminder of the amount you owe in tax, penalty, and interest.
CP71AA reminder of the amount you owe in tax, penalty, and interest.
CP71CA reminder of the amount you owe in tax, penalty, and interest.
CP71DA reminder of the amount you owe in tax, penalty, and interest.
CP88The IRS is holding your refund because you haven't filed one or more tax returns, and it believes you will owe tax.
CP90The IRS is notifying you of its intent to levy certain assets for unpaid taxes. You have the right to dispute the levy in a Collection Due Process hearing.
CP91The IRS will levy up to 15% of your social security benefits for unpaid taxes.
CP120The IRS needs documentation of your tax-exempt status.
CP120AYour organization’s tax-exempt status has been revoked because it failed to file a Form 990 series return for three consecutive years.
CP130You may no longer need to pay the Alternative Minimum Tax (AMT) because your tax return filing requirements changed.
CP152The IRS received your return.
CP153The IRS will send your refund by mail because your direct deposit did not go through.
CP161You have an unpaid balance due to the IRS.
CP166Your monthly payment to the IRS did not go through due to insufficient funds in your bank account.
CP178You may no longer owe excise tax because your tax return filing requirements changed.
CP231You need to update your address because your refund was returned to the IRS.
CP259You did not file the business tax return identified in the notice.
CP259AYou should have filed these forms but did not – Form 990/990-EZ, Return of Organization Exempt From Income Tax, or Form 990-N (e-Postcard).
CP259BThe IRS requires you to file these forms but did not – Form 990-PF, Return of Private Foundation or Section 4947(a)(1) Nonexempt Charitable Trust Treated as a Private Foundation.
CP259CThe IRS believes that you are a private foundation, but did not file the required Form 990-PF, Return of Private Foundation or Section 4947(a)(1) Nonexempt Charitable Trust Treated as a Private Foundation.
CP259DYou must file this form, but you did not – Form 990-T, Exempt Organization Business Income Tax Return.
CP259EYou should have filed this form, but you did not – Form 990-N (e-Postcard) or Form 990/990-EZ, Return of Organization Exempt From Income Tax.
CP259FThe IRS requires you to file this form but did not – Form 5227, Split-Interest Trust Information Return.
CP259GThe IRS requires you to file this form, but you didn’t – Form 1120-POL, U.S. Income Tax Return for Certain Political Organizations.
CP259HAs a tax-exempt political organization, you must file this form, but you did not – Form 990/990-EZ, Return of Organization Exempt From Income Tax.
CP276AYou submitted your tax liability schedule incorrectly. The IRS typically charges a Federal Tax Deposit (FTD) penalty for this but did not this time.
CP276BThe IRS did not receive the correct amount of tax deposits. It normally charges a Federal Tax Deposit (FTD) penalty but did not this time.
CP297The IRS is notifying you of its intent to levy certain assets for unpaid taxes. You have the right to dispute the levy at a Collection Due Process hearing.
CP297AThe IRS has levied your assets for unpaid taxes. You have the right to dispute the levy at a Collection Due Process hearing.
CP298The IRS notifying you of its intent to levy up to 15% of your social security benefits for unpaid taxes.
CP501You have a balance due on one of your tax accounts.
CP503You have an unpaid balance on one of your accounts, and the IRS has not heard from you.
CP504You have an unpaid amount due on your account. If you do not pay immediately, the IRS will levy your state income tax refund to apply it to the amount you owe.
CP504BYou have an unpaid amount due on your account. If you do not pay immediately, the IRS will levy certain property or rights to property to apply it to the amount you owe.
CP521A reminder that you have an installment agreement payment due.
CP523You have defaulted on your payment agreement. Therefore the IRS is terminating the agreement and will levy your assets.
CP601Usted tiene un saldo pendiente de pago (dinero que le debe al IRS) en una de sus cuentas contributivas.
CP603No hemos recibido respuesta de parte de usted y todavía tiene un saldo sin pagar en una de sus cuentas contributivas.
CP604Usted tiene un saldo sin pagar en su cuenta. De no pagar esta cantidad inmediatemente, el IRS embargará cualquier reembolso de impuestos estatales al que tenga derecho y aplicarlo al pago de su deuda.
CP604BUsted tiene un saldo sin pagar en su cuenta. De no pagar esta cantidad inmediatemente, el IRS embargará ciertas propiedades o derechos de propiedad y lo aplicará al pago de su deuda.
CP621Este aviso es para notificarle que usted tiene un plan de pagos a plazos vencido. Por favor, envíe el pago inmediatamente.
CP623Este aviso es para informarle nuestra intención de cancelar su plan de pagos a plazos y confiscar (embargar) sus bienes. Usted incumplió en su acuerdo.
CP711Nosotros realizamos cambios a su planilla debido a que entendemos que hubo un cálculo erróneo. Como resultado de estos cambios, usted adeuda dinero por sus contribuciones.
CP721Hicimos el(los) cambio(s) que usted solicitó a su declaración de impuestos para el año tributario que aparece en su aviso. Como resultado de éste(estos) cambio(s) usted debe dinero en sus impuestos.
CP722Hicimos el(los) cambio(s) que usted solicitó a su declaración de impuestos para el año tributario que aparece en su aviso. Como resultado de éste(estos) cambio(s) usted debe dinero en sus impuestos.
CP771Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP772Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP773Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP774Usted recibió este aviso para recordarle sobre la cantidad que adeuda en contribuciones, multas e intereses.
CP959Usted no radicó su planilla de contribución de negocios identificada en este aviso.
CP2000The income or payment information on file doesn’t match your tax return. The discrepancy may result in an increase or decrease in your tax due.
CP3219AThe IRS has received information that is different from what you reported on your tax return. This may result in an increase or decrease in your tax.
CP3219NThe IRS didn’t receive your tax return, so it calculated your return based on the information received from employers, financial institutions, and others. If you want to challenge the proposed tax, you have 90 days from the date of this notice. If you are outside the country, you have 150 days.
Letter 0012CThe IRS needs additional information to process your tax return.
Letter 0484CThe IRS wants a completed
Letter 0525Updates you on proposed changes after an IRS examination. Any changes are explained and details the refund due or taxes owed.
Letter 531IRS Notice of Deficiency. The information the IRS received about you was different from what you reported on your return.
Letter 0668D(LP 68)The IRS released their levy.
Letter 0549CYour tax bill was paid.
Letter 0681CThe IRS accepted your payment proposal. However, this is not a formal Installment Agreement.
Letter 0757CYou did not adhere to the terms of your Installment Agreement.
Letter LT 11The IRS plans to seize your property or rights to property.
Letter 1058The IRS has not received your payment. It plans to seize your property or rights to property.
Letter 1615 (LT 18)You must respond to the IRS within 10 days of this notice regarding past due tax returns.
Letter 1737 (LT 27)Complete and sign Form 433F, Collection Information Statement.
Letter 1961CYour application for a Direct Debit Installment Agreement was declined. It explains why and what you need to do to qualify.
Letter 1962CYour application for a
Letter 2050 (LT 16)The IRS is trying to collect unpaid taxes from you from returns that have been filed or from returns that have not been filed.
Letter 2257CThe IRS is providing the payoff amount that you requested.
Letter 226-JAn IRS letter to large employers notifying them that they may be liable for an Employer Shared Responsibility Payment (ESRP).
Letter 2271CA request for an Installment Agreement has been approved. It explains the fees and how to qualify for a Low Income Fee Reduction. The letter may also request missing information.
Letter 2272CAn IRS letter explaining why your request to pay the balance due in installments was declined.
Letter 2273CA confirmation letter of your request to pay the balance due in installments. It contained the amount to pay, fees charged, and where to send payment. Instructions on how to apply for the Low Income Fee Reduction included.
Letter 2318CA response to a request to pay taxes due to payroll deductions. It also explains the fees that are charged.
Letter 2357CThe IRS is admitting that it did not send you the balance due notices that it should have.
Letter 2603CThe IRS accepted your installment agreement. The IRS will file a Notice of Federal Tax Lien on your personal property.
Letter 2604CThe IRS has accepted your request for installment payments. This IRS letter provides the monthly payment, the address where to send it, and the fees charged. The letter also provides instructions on how to apply for the Low Income Fee Reduction.
Letter 2761CThe IRS is requesting your combat zone service dates to ensure that it provides you with the special provisions and protection of the combat zone deferment. Copies of military orders or other documentation to support your time served may be requested. Civilians working in support of the Armed Forces may be required to provide a Letter of Authorization or a letter from their employer.
Letter 2789CAn annual reminder notice, as required by law, of the balance due to the IRS. It explains that penalties and interest continue to accrue until the balance is fully paid.
Letter 2840CConfirms your Installment Agreement request and includes the payment amount and due date. This IRS letter explains the fees charged for paying monthly and explains how to apply for the Low Income Fee Reduction (if you qualify).
Letter 3030CProvides an explanation of the tax, penalty, and interest still due on your account.
Letter 3127CA confirmation of your request to make a change to your Installment Agreement. This IRS letter explains the fees for the change. Changes can be to the payment amount or due date, or it can include additional liabilities.
Letter 3174A reminder of taxes due after the IRS has sent a Notice of Intent to Levy.
Letter 3217CThe IRS has accepted your request to pay the balance in installments. This IRS letter provides your payment amount, the due date, and fees charged. The letter also provides instructions on applying for the Low Income Fee Reduction (if you qualify).
Letter 3228 (LT 39)A request to pay the balance due within 10 days using the envelope provided.
Letter 3500The IRS has received your documents, and it needs additional time to review them.
Letter 3572Your Federal Income Tax Return has been selected for examination. The IRS auditor requests that you call to schedule an audit appointment.
Letter 4883CThe IRS received your federal income tax return but needs more information to verify your identity in order to process your tax return accurately.
Letter 4903 (LT 26)You must file your tax returns immediately. The IRS has previously contacted you, but it did not receive a response.
Letter LP 47The IRS is trying to locate the person identified in the letter and is requesting that you provide their new address.
Letter LP 59The IRS has not received a response to the notice of levy it previously sent.
Audit Letter 2205The IRS manages audits either by mail or through an in-person interview to review your records. The interview may be at an IRS office (office audit) or the taxpayer’s home, place of business, or accountant’s office (field audit).
Letter 915You recently underwent an audit, and the IRS informs you that you now owe taxes.

Key takeaways

  • The IRS ST16 Notice indicates that the IRS may start collection actions for unpaid taxes.
  • Ignoring the notice can result in wage garnishments, tax liens, or other serious consequences.
  • Respond promptly by reviewing your tax records, contacting the IRS, and making payment arrangements if necessary.
  • Seeking professional tax advice can help ensure you handle the situation appropriately.

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