Can a CPA File My Taxes? Documents, Deadlines, and Costs

Yes, a CPA can file your taxes. A licensed certified public accountant is authorized to prepare your federal return, sign it as the paid preparer, and transmit it to the IRS electronically on your behalf once you approve the figures. CPAs also carry something most other preparers do not: unlimited authority to represent you before the IRS on audits, appeals, and collections tied to that return.¹ You remain legally responsible for what the return says, so knowing how the process works protects you as much as it helps your CPA.²

Why a CPA Instead of Another Preparer

The IRS sorts paid preparers into two groups by what they can do for you if the return gets questioned later. CPAs, attorneys, and enrolled agents have unlimited representation rights. They can speak for you on any IRS matter, including audits, appeals, and collections disputes, whether or not they prepared the return.¹

Everyone else has limited rights or none. A preparer in the IRS Annual Filing Season Program can represent you only during an examination of a return they personally prepared, and only in front of certain IRS employees. They cannot appear at an appeal or handle a collections case. A preparer with nothing beyond a Preparer Tax Identification Number has essentially no representation authority at all.¹

If your return is simple and nothing ever goes wrong, this difference is invisible. If the IRS sends a notice a year after filing, it is the whole ballgame.

Verify the CPA Before You Hand Over Documents

Every paid preparer, including a CPA, must hold a current Preparer Tax Identification Number and include it on every return they prepare. Federal law treats the PTIN as the IRS’s primary way of tracking who prepared a return,³ and the number must be renewed each year before filing season opens.⁴

Two checks take a few minutes and cost nothing:

Look up the preparer in the IRS Directory of Federal Tax Return Preparers with Credentials and Select Qualifications at irs.treasury.gov. You can search by ZIP code, last name, or credential type. A listing confirms the CPA has an active PTIN and is recognized by the IRS.
Check the CPA license itself with your state board of accountancy. CPA licensing happens at the state level, so IRS registration alone does not tell you whether the underlying license is current and in good standing.

One warning sign to know before you ever sit down: a preparer who takes your money but refuses to sign the return. The IRS calls this a “ghost preparer,” and the signature requirement exists precisely to prevent it.²

What to Bring to Your CPA

Most firms send an intake organizer before your first appointment. You can save yourself a second trip by pulling the following before you go.

Identification for Everyone on the Return

Every person on the return needs a taxpayer identification number, usually a Social Security number. Non-citizens ineligible for an SSN use an Individual Taxpayer Identification Number.⁵ Have numbers ready for yourself, your spouse if filing jointly, and every dependent.

Income Records

Bring the documents the IRS already has copies of, straight from the issuer. Employers report wages on Form W-2.⁶ Banks, brokerages, and clients who paid you as an independent contractor issue 1099 forms covering interest, dividends, investment sales, and freelance income. Matching what the IRS was told about your income is the whole point; a mismatch gets flagged automatically.

Deduction and Credit Documentation

If you plan to itemize instead of taking the standard deduction ($16,100 for single filers and $32,200 for married couples filing jointly for 2026),⁷ bring organized records of charitable donations, medical bills, and business expenses. Your mortgage lender will send Form 1098 showing interest paid during the year.⁸

A copy of last year’s return helps too. It gives your CPA a quick reference for carryover items like capital losses, depreciation schedules, and estimated tax payments carrying into the current year.

How the Filing Actually Happens

After your CPA drafts the return, you review it. Look at income totals, deductions, and the final refund or balance due. Errors caught here cost nothing; errors caught later can cost a lot.

To authorize electronic filing, you sign Form 8879, the IRS e-file Signature Authorization. That form is what gives your CPA permission to transmit the return, and nothing goes to the IRS until the signed form is back in your CPA’s hands.⁹ You can sign it by hand or electronically if the software supports it. Read it before signing, because the same form can also authorize a direct debit from your bank account for any tax you owe.

Once the return is transmitted, your CPA receives an electronic acknowledgment from the IRS. The IRS then sends either an acceptance notice or a rejection if there are technical issues. Your CPA should tell you the outcome and provide a final copy for your records.

Deadlines and What an Extension Actually Does

Individual federal returns for the 2025 tax year are due April 15, 2026.¹⁰ If your CPA needs more time, they can file Form 4868 for an automatic extension to October 15, 2026.¹¹

An extension gives you more time to file, not more time to pay. Any tax owed is still due by April, and the IRS charges interest and penalties on unpaid balances after that. If you expect to owe, ask your CPA to estimate the amount and pay it when the extension goes in.¹¹

What CPA Tax Preparation Costs

Fees vary widely by complexity and location. A straightforward W-2 return with the standard deduction typically runs in the low hundreds of dollars. Itemized deductions, investment income, or rental properties push the price into the mid-hundreds or higher. Self-employment income, business entities, and multi-state filings push it higher still.

Ask for a fee estimate upfront. Most CPAs are willing to quote a range once they understand your situation, and some charge a flat fee for common return types rather than billing by the hour. The cost is higher than tax software or a seasonal storefront preparer; what you are paying for is expertise on a complicated return and someone who can handle an IRS notice later.

Representation and Recordkeeping After Filing

If the IRS follows up after you file, a CPA can step in only if you grant them a power of attorney using Form 2848. That form lets them communicate with the IRS on your behalf, review your confidential tax information, and sign agreements or waivers related to the matter.¹² Because CPAs hold unlimited representation rights, that authority extends to examinations, appeals, and collections.¹ The power of attorney covers only the specific tax years and matters you list on the form, so include every year you want the CPA to handle.

You are still the person legally accountable for the accuracy of the return.² The IRS recommends keeping tax records for at least three years from the date you filed, which matches the standard audit window. Two situations require longer. If you underreported income by more than 25 percent, the IRS has six years to assess additional tax. If you never filed or filed a fraudulent return, there is no time limit. Records tied to property, stock purchases, and retirement accounts are worth keeping as long as you own the asset, because you will need them to figure gain or loss when you sell.¹³

If Something Goes Wrong With the Preparer

If a preparer refuses to sign your return, inflates deductions without telling you, or files a return without your consent, you can report them to the IRS on Form 14157, the Return Preparer Complaint. If someone filed or altered a return without your consent, you also submit Form 14157-A, the Tax Return Preparer Fraud or Misconduct Affidavit.¹⁴ Both go by fax or mail to the IRS Return Preparer Office.¹⁵

1
Internal Revenue Service. Understanding Tax Return Preparer Credentials and Qualifications
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Internal Revenue Service. Topic No. 254, How to Choose a Tax Return Preparer
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Office of the Law Revision Counsel. 26 U.S. Code 6109 – Identifying Numbers
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Internal Revenue Service. PTIN Requirements for Tax Return Preparers
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Internal Revenue Service. Taxpayer Identification Numbers (TIN)
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Internal Revenue Service. About Form W-2, Wage and Tax Statement
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Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
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Internal Revenue Service. Form 1098 (Rev. April 2025)
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Internal Revenue Service. Form 8879 (Rev. January 2021) IRS e-file Signature Authorization
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Internal Revenue Service. When to File
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Internal Revenue Service. Get an Extension to File Your Tax Return
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Internal Revenue Service. Instructions for Form 2848 Power of Attorney and Declaration of Representative
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Internal Revenue Service. How Long Should I Keep Records?
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Internal Revenue Service. IRS: Don’t Be Victim to a Ghost Tax Return Preparer
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Internal Revenue Service. Return Preparer Complaint