If your tax preparer made a mistake and you’re wondering who is responsible, the short answer is that you are, at least to the IRS. Your signature on the return makes the numbers yours under penalty of perjury, so the unpaid tax, the interest, and usually the accuracy penalty come out of your pocket first.1Internal Revenue Service. Significant Service Center Advice 1998-054 The preparer isn’t off the hook, though. They face their own IRS penalties, and you have real routes to get your penalty waived and to recover from them what their error cost you.
What You Actually Owe After the Error
Three separate charges can land on your account when an error surfaces:
- The unpaid tax itself. No penalty waiver and no settlement with the preparer wipes this out. If the correct return said you owed more, you owe more.
- Interest at 7% per year, compounded daily as of early 2026, running from the original due date of the return until you pay in full.2Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026
- An accuracy-related penalty of 20% of the underpayment when the underlying position was careless or unsupported.3Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
The IRS generally has three years from your filing date to assess additional tax.4Internal Revenue Service. Time IRS Can Assess Tax So an error from a return filed a couple of years ago is still live.
Fix the Return First
Correcting the return is the first move, whether or not you plan to fight the penalty or chase the preparer. Once you know the numbers are wrong, interest keeps compounding until the corrected balance is paid.
File Form 1040-X, Amended U.S. Individual Income Tax Return, either electronically or on paper. The form asks for the original figures, the corrected figures, the difference, and a plain-language explanation of what changed.5Internal Revenue Service. File an Amended Return
If the correction produces a refund, you generally have three years from the date you filed the original return (including any extension) or two years from the date you paid the tax, whichever is later. If you filed before the April deadline, the three years run from that deadline, not from the day you submitted.6Internal Revenue Service. Instructions for Form 1040-X (Rev. December 2025)
If the correction means you owe more, file and pay as soon as you can. Waiting for the preparer to sort things out just runs the interest meter.
One easy thing to miss: if your state has an income tax, a change to your federal return almost always triggers an amended state return. State deadlines for reporting federal changes are commonly 90 to 180 days after the federal amendment, so check with your state tax agency to avoid a second stack of penalties.
How to Get the Penalty Waived
The 20% accuracy-related penalty is the piece most likely to come off. Federal law provides that no accuracy-related penalty applies to any portion of an underpayment for which the taxpayer had reasonable cause and acted in good faith. Reliance on a professional preparer can qualify, but the IRS applies a three-factor test:7Internal Revenue Service. Reasonable Cause and Good Faith Practice Unit
- The preparer was actually competent in the area of tax law involved. You can’t lean on advice from someone you knew or should have known was unqualified.
- You gave the preparer complete and accurate information. If you left out income or handed over incomplete records, this factor sinks the defense.
- You genuinely relied on the advice in good faith, not as an after-the-fact excuse.
Reasonable-cause reliance covers technical tax issues. It does not excuse a late filing or a late payment, because those obligations sit with you regardless of who does the paperwork.8Internal Revenue Service. Internal Revenue Manual 20.1.1 – Introduction and Penalty Relief
Even if the reasonable-cause argument doesn’t fit, ask about first-time penalty abatement. If you haven’t been assessed penalties in the prior three tax years and are current on required filings, the IRS can remove the penalty administratively.9Internal Revenue Service. Administrative Penalty Relief Plenty of taxpayers qualify and never think to ask.
Getting the Preparer to Pay for What They Cost You
You will owe the underlying tax no matter what. But the penalty and the interest are financial losses the preparer arguably caused, and there are three practical routes to recover them.
Ask the Preparer Directly
Start with the preparer. Explain the error, the assessed penalty, the interest, and the cost of the amendment. Many reputable preparers carry errors-and-omissions insurance for exactly this situation and will cover penalties and interest they caused or prepare the amended return at no charge. Get any agreement in writing before you accept it.
File an IRS Complaint
If the preparer is uncooperative or the conduct looks like misconduct rather than an honest slip, file Form 14157, Return Preparer Complaint. If you also received an IRS notice tied to the error, attach Form 14157-A, Tax Return Preparer Fraud or Misconduct Affidavit, along with a copy of the notice.10Internal Revenue Service. Make a Complaint About a Tax Return Preparer A complaint won’t return money to you, but it opens an IRS investigation that can end the preparer’s ability to practice.
Sue
For actual recovery, small claims court is usually the most accessible option. Maximum claims vary by state, roughly $2,500 to $25,000. If your losses exceed the small claims limit, you’re looking at a higher court and probably an attorney. Whichever venue, keep every IRS notice, penalty assessment, interest calculation, and message with the preparer. That paper trail is your case.
What the IRS Does to the Preparer
You’ll want to know the preparer faces their own consequences, because it affects both the leverage you have and whether they’re likely to make you whole.
Under Section 6694, a preparer who takes a position without substantial authority that leads to an underpayment can be fined the greater of $1,000 or 50% of the fee they earned on the return. If the conduct was willful or reckless, the fine jumps to the greater of $5,000 or 75% of the fee.11Office of the Law Revision Counsel. 26 USC 6694 – Understatement of Taxpayer’s Liability by Tax Return Preparer
Separate procedural penalties apply when a preparer fails to sign the return, fails to include their Preparer Tax Identification Number (PTIN), or fails to give you a copy of the finished return.12Office of the Law Revision Counsel. 26 USC 6695 – Other Assessable Penalties With Respect to the Preparation of Tax Returns for Other Persons Preparers also owe specific due diligence when claiming the Earned Income Tax Credit, the Child Tax Credit, and the American Opportunity Tax Credit, and skipping those steps triggers a per-return fine.
The IRS Office of Professional Responsibility can censure, suspend, or permanently disbar preparers from practice before the IRS.13Internal Revenue Service. Office of Professional Responsibility and Circular 230 Outright fraud can move the case into criminal territory.14Internal Revenue Service. Tax Preparer Penalties
Choosing Someone Different Next Time
A few things separate careful preparers from the ones who create these problems. A “ghost” preparer fills out your return but refuses to sign it or include a PTIN. Every paid preparer is required by law to sign returns they prepare and include their PTIN.15Internal Revenue Service. PTIN Requirements for Tax Return Preparers Other warning signs include cash-only demands without a receipt, promises of inflated refunds, invented income to unlock credits, and instructions to send your refund to their bank account rather than yours.16Internal Revenue Service. Tax Tip: Taxpayers Should Beware of Ghost Preparers
Credentials also matter, especially if the return draws an audit. Attorneys, CPAs, and Enrolled Agents can represent you at any level of the IRS. Preparers who complete the Annual Filing Season Program have limited representation rights and can only appear before revenue agents and customer service representatives for returns they personally prepared and signed.17Internal Revenue Service. Annual Filing Season Program A preparer with no credential and no Annual Filing Season Program completion cannot represent you before the IRS at all for returns prepared after 2015.
The IRS keeps a searchable directory of preparers who hold recognized credentials or completed the Annual Filing Season Program.18Internal Revenue Service. FAQs Directory of Federal Tax Return Preparers With Credentials and Select Qualifications If a preparer you’re considering isn’t listed, ask about their credentials before you hand over documents. And whoever prepares the return, read every line before you sign it. That signature is what makes it yours.