If you have NOT e-filed yet you can go to Federal Review for the questions about the recovery rebate credit. If you already e-filed you cannot correct it. The IRS is checking for mistakes on line 30 for that credit. If you made a mistake they will correct it for you. That will delay your refund.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**