When using turbo tax I enter my stimulus first payment of 1200.00 and second of 600.00 , program checks for errors and opens up window for this needs looking at. Shows line 19 on the Recovery Rebate Credit Worksheet and it states Second received previously must be entered. I did enter it earlier .
There seems to be an error with your Recovery Rebate credit wroksheet.
Delete the form that has the error.
You will need to open TurboTax in a browser or on a computer. This will not work in the app.
At the top of your tax return select Federal Review
That will take you to this screen where it asks if you have already received your stimulus payments. If you received the first or second payment already, then select Yes and fill in the information. If you did not receive any payment select No. If you received the first payment only, fill in that amount and put zero (0) for the second payment.
When the screen is correct, you refund will be adjusted for the amount of stimulus payment that will be added to your 2020 refund.