What to Do If Your W-2 Shows Incorrect HSA Contributions (Code W in Box 12a)?

If you find that your W-2 form displays an error in Box 12a with Code W related to HSA contributions, it's important to take prompt action to rectify the issue. Here's what you can do if you encounter this situation:

1. Contact Your Employer:

  • Reach out to your employer's HR or payroll department to inform them about the error.

2. Request Correction:

  • Ask your employer to issue a corrected W-2 form with the accurate HSA contribution information.

3. Review Your Records:

  • Double-check your own records to ensure that the HSA contributions you made align with what is reported on the corrected W-2 form.

4. Amend Your Tax Return:

  • If you have already filed your taxes using the incorrect W-2 information, you may need to file an amended tax return with the correct details once you receive the updated form.

5. Seek Professional Help:

  • If you are unsure about the steps to take or need assistance with amending your tax return, consider consulting a tax professional for guidance.

Remember, it's essential to address any discrepancies in your tax documents promptly to avoid potential issues with the IRS. By following these steps, you can correct errors in your W-2 related to HSA contributions efficiently.


Discovering an error in Box 12a of your W-2 form related to HSA contributions can be alarming, but it's crucial to tackle it head-on. Your first step should be to reach out to your employer's HR or payroll department to alert them of the mistake.

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