How to Correct Your PCORI Filing If You Made a Mistake

The first step is to identify the type of error made. Was it a simple input issue, or did it affect the fee amount due? Based on this, choose the appropriate correction method.

1. Minor Errors: Resubmit Form 720 with Corrections

If the mistake is minor—like an incorrect EIN, tax period, address, or number of lives covered—it can often be corrected by simply resubmitting Form 720. In this new submission:

• Include a note explaining the original mistake and the correction.

• Ensure the rest of the information remains accurate and matches the IRS records.

• Timeline: This resubmission should ideally be done within the same quarter of the original filing or as soon as the error is discovered. The IRS prefers corrections as timely as possible to avoid confusion or penalties.

2. Major Errors: File an Amendment Using Form 720-X

If the error affects the amount of PCORI fee paid—for example, if you underreported the number of covered lives or overpaid—then a correction must be made using Form 720-X, the amendment form for correcting excise tax filings.

• This form clearly outlines the adjustments in tax liabilities.

• Make sure to provide documentation supporting the changes.

Form 720-X is used to amend a previously filed Form 720. It’s especially relevant when:

• You need to correct reporting errors that affect tax liability.

• You are requesting a refund or credit for overpaid PCORI fees.

• You are making formal adjustments after discovering significant misreporting.

Note: Form 720-X cannot be used for original or late PCORI filings—it is only for amending an already filed Form 720.

To reduce the chances of needing a correction:

1. Double-check your tax period and EIN before submission—these are the most common input errors.

2. Verify the number of covered lives carefully to ensure the PCORI fee is calculated accurately.

3. Use IRS-authorized PCORI Submission portals like Simple720: With advanced validations, our portal catches common mistakes before submission.

Conclusion

Correcting a PCORI filing error isn’t as intimidating as it may seem—but acting promptly is key. Whether it’s a minor typo or a major calculation error, there are clear paths through Form 720 or Form 720-X to help you amend your filing properly. 

Taking the time to review your data before submitting can help prevent these issues entirely. And when needed, the IRS provides structured ways to get back on track.

Filing PCORI accurately ensures you're compliant and avoids unnecessary penalties or refund delays. Stay informed, file confidently, and don’t hesitate to correct mistakes the right way.