Letter 6255C tells you the IRS will contact a third party to verify the income and federal withholding you claimed on your return. An example of a third party is an employer who paid you.
This is a review, not an accusation. The IRS selects some returns to check whether income, expenses, and credits are reported accurately. Being selected doesn't mean you made an error or were dishonest.
What to Do
If you filed the return, you don't need to take any action.
Still, use the time well. Review your return for errors. If something is wrong, file a corrected or amended return to fix it. Go over the letter with your tax preparer if you used one.
If you didn't file the return, someone may have filed it in your name without your consent. Send the IRS a completed and signed Form 14039, Identity Theft Affidavit.
How Long Will This Take?
Don't call right away. The IRS asks that you wait 60 days from the date of the letter. If you haven't received your refund or heard from the IRS by then, call.
Keep the letter and a copy of your return together. Have your W-2s, 1099s, and pay records ready in case questions come up about your income or withholding.
Protect Your Number
Consider an IRS Identity Protection PIN. It helps prevent someone from filing a fraudulent federal return with your taxpayer identification number.
If This Is Causing Hardship
If the delay is causing economic hardship, or you can't resolve the problem through normal channels, contact the Taxpayer Advocate Service. TAS is an independent organization within the IRS. You can also authorize a representative to contact the IRS for you.
If you received Letter 6255C and your refund is stuck, call us at (813) 229-7100.