I got Notice 4883C or 5071C from the IRS. What is it?
Notice 4883C and 5071C are letters the IRS sends if they have received a tax return for you and they are concerned it might be fraudulent. If you did submit a return, you will need to verify your identity, either online or on the phone, according to the instructions on the letter. If you did not submit a tax return, then this letter indicates that a fraudster tried to submit a return using your information. You should follow the instructions to report this fraud to the IRS, to make sure your future payments are not negatively affected.