After you file

It would have been included in your refund check or deposit.  

Enter interest from the IRS like a 1099Int and put the amount in box 1.  Enter it manually and just enter IRS for the payer.  Don't enter any other info like the address or a EIN.

 

Enter a 1099-Int  under

Federal on left

Wages & Income 

Interest and Dividends

Interest on 1099INT - Click the Start or Revisit button