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Letter 6478C: IRS Request for Digital Asset Clarity

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Last updated 11/10/2024 by
SuperMoney Team
Fact checked by
Ante Mazalin
Summary:
Letter 6478C is issued by the IRS to request clarification from taxpayers regarding specific non-traditional investments, such as cryptocurrencies or non-fungible tokens (NFTs). This letter highlights potential discrepancies or missing information about these assets on tax returns, aiming to ensure compliance with tax regulations and accurate reporting. The letter provides taxpayers with guidance on how to submit additional documentation, correct errors, and avoid penalties.
Receiving an unexpected notice from the IRS can be concerning, especially when it involves non-traditional investments like cryptocurrencies and NFTs. Letter 6478C typically signals that the IRS requires additional information on assets in these categories, often due to unclear or incomplete reporting. With the rising popularity of digital assets, the IRS has increased its focus on ensuring proper tax compliance in these areas. In this guide, we’ll walk you through what Letter 6478C means, why you received it, and how to respond to protect your financial standing and avoid penalties.

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What is IRS letter 6478C?

Letter 6478C is a formal IRS communication sent to taxpayers when the agency needs further information about certain types of investments that fall outside traditional categories. Often, these involve:
  • Cryptocurrency transactions, including buying, selling, or trading virtual currencies
  • Ownership of non-fungible tokens (NFTs)
  • Any income or gains derived from digital assets
The letter usually indicates that the IRS has found inconsistencies in reported income related to these assets or lacks sufficient details to verify the taxpayer’s claims. Given the complexity of tracking digital assets and their tax implications, Letter 6478C helps the IRS ensure accurate reporting and full compliance with tax laws.
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.

Why did I receive IRS letter 6478C?

Common reasons for receiving letter 6478C

There are several common reasons why you might receive a Letter 6478C, including:
  • Unreported cryptocurrency transactions: If you’ve traded, bought, or sold cryptocurrencies but didn’t report these transactions accurately on your tax return, the IRS may issue this letter to clarify your records.
  • Inconsistent NFT holdings: NFTs are classified as property by the IRS, and their sale or transfer can have tax implications. If your return doesn’t accurately reflect these assets, the IRS may request further information.
  • Incorrect income reporting: Any income derived from staking, lending, or mining digital assets should be reported, as it is considered taxable income. Letter 6478C may indicate that the IRS suspects missing or incorrect income disclosures.

IRS focus on non-traditional investments

The IRS’s attention to digital assets has increased in recent years due to the rapid growth of cryptocurrency and NFT markets. As part of an effort to prevent tax evasion and ensure compliance, the IRS now requires taxpayers to answer specific questions about these assets, including providing the fair market value and capital gains associated with their sale or transfer.

Pro tip

Keep detailed records of all cryptocurrency transactions, including exchange history, wallet addresses, and transaction IDs. This documentation will make it easier to respond to IRS inquiries, such as those in Letter 6478C.

How does letter 6478C affect you?

Receiving Letter 6478C means you’ll need to address any discrepancies or omissions in your reported assets to avoid potential penalties. Here’s how it impacts your tax obligations:
  • Requires prompt action: Ignoring the letter can lead to additional inquiries or penalties. Responding quickly can help you avoid further complications.
  • May involve documentation submission: You may be required to provide detailed records, such as transaction histories, wallet information, or statements that prove asset ownership and value.
  • Potential penalties for non-compliance: If discrepancies are found or if you fail to respond, the IRS may apply penalties, interest, or additional taxes based on the unreported income.

Steps to take when you receive IRS letter 6478C

Upon receiving Letter 6478C, it’s important to act immediately to ensure that your response is timely and accurate. Here’s what you should do:

1. Review the letter thoroughly

Carefully read the details in the letter to understand the IRS’s concerns. Identify any specific transactions or assets the IRS has highlighted. Make a list of the requested documents, such as cryptocurrency exchange statements, wallet records, or proof of NFT purchases and sales.

2. Gather relevant documentation

Compile the necessary records to verify your digital asset holdings. You may need:
  • Transaction records from exchanges: Download statements from cryptocurrency exchanges, showing purchase and sale dates, amounts, and transaction fees.
  • Wallet transaction histories: For off-exchange assets, you’ll need blockchain wallet histories to substantiate ownership and valuation.
  • NFT sales or transfer documentation: Provide documentation of NFT sales, including proof of purchase and sale prices for accurate capital gain calculation.

3. Correct errors on your tax return

If you find that you’ve underreported or incorrectly reported any cryptocurrency or NFT transactions, it’s essential to amend your tax return. This correction will ensure that your records are consistent with the information you submit to the IRS.

4. Respond to the IRS promptly

Submit your response by the deadline specified in Letter 6478C. Make sure your response includes all requested documentation and any necessary amendments to your tax return. This will help expedite the resolution and prevent further inquiries or penalties.

Pro tip

Use tax software that supports cryptocurrency and NFT transactions. This can help you accurately track your digital asset investments and simplify your tax filings, ensuring compliance and minimizing errors.

Additional resources for responding to IRS letter 6478C

For those unfamiliar with digital asset reporting, reaching out for professional assistance may be beneficial. Consider the following options:
  • Consult a tax professional: A certified public accountant (CPA) or tax attorney specializing in digital assets can guide you in navigating the IRS’s requirements.
  • IRS online resources: Visit the IRS website for guidance on digital assets and reporting requirements, especially for cryptocurrency and NFTs.
  • IRS helpline: The IRS offers a support line to assist with inquiries regarding notices and letters. Calling can provide clarification on required documentation or steps.

What happens if you don’t respond to letter 6478C?

Failing to respond to Letter 6478C can lead to several consequences:
  • Possible penalties and interest: Unreported or misreported income can incur fines and interest until corrected.
  • Extended IRS inquiries: Ignoring the letter may result in further IRS inquiries or audits, potentially leading to additional scrutiny on other parts of your tax return.
  • Delayed refunds: If you are owed a refund, it could be delayed until the issue is resolved and the IRS is satisfied with your response.

Pro tip

Consider seeking help from a tax professional who specializes in cryptocurrency and digital assets. They can provide expert guidance on how to navigate complex tax rules related to NFTs and crypto investments, especially if you receive an IRS letter like 6478C.

Potential outcomes of responding to letter 6478C

Once you respond, here are some possible outcomes:
  • Resolved discrepancies: If you provide all requested documentation, the IRS may update your account without further issues.
  • Further adjustments required: In some cases, the IRS may request additional documentation to clarify certain transactions.
  • Protection against penalties: By responding accurately and promptly, you reduce the risk of penalties and help ensure smooth future filings.
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Frequently asked questions

What is the purpose of letter 6478C?

Letter 6478C is sent by the IRS to request clarification or additional information regarding your non-traditional investments, such as cryptocurrency or NFTs. The IRS uses this letter to ensure that you have accurately reported any income or gains from these assets on your tax return. It is a request for verification of transactions or values that may not have been properly documented.

How can I respond to letter 6478C?

To respond to Letter 6478C, carefully review the letter to understand the IRS’s concerns. Gather the required documentation, such as cryptocurrency exchange records, wallet histories, and proof of NFT transactions. If necessary, amend your tax return and submit the documents along with your response by the deadline specified in the letter. Prompt and complete responses will help prevent further inquiries or penalties.

What happens if I don’t respond to letter 6478C?

If you don’t respond to Letter 6478C, the IRS may impose penalties for unreported income, or your tax return could be delayed. The IRS may also initiate further actions to correct your tax records, which could result in audits, additional penalties, or a delay in refunds. It’s important to respond promptly to resolve the issue and avoid complications.

Can letter 6478C affect my tax refund?

Yes, if you received Letter 6478C and haven’t provided the requested information, your tax refund may be delayed. The IRS cannot process your tax return or issue a refund until they have resolved any discrepancies regarding your digital assets. Responding quickly with the necessary documentation can help speed up the processing of your refund.

What are the consequences of not reporting cryptocurrency or NFTs properly?

Failure to properly report cryptocurrency transactions or NFTs can lead to significant tax consequences, including penalties, interest on unpaid taxes, and even audits. The IRS considers digital assets taxable, and unreported income or gains can result in additional tax liabilities. It’s essential to ensure that you accurately report all cryptocurrency and NFT activities to avoid these potential issues.
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

  • Letter 6478C is issued by the IRS when clarification is needed on non-traditional investments like cryptocurrency and NFTs.
  • Common reasons include missing or inconsistent income reports related to digital assets.
  • Timely response with detailed documentation can help avoid penalties and ensure compliance.
  • Consulting a tax professional can be beneficial, especially for complex asset histories.

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