What do you mean you included 2019? You have to do each year separately. Online is only for 2020. You need to delete any 2019 info or clear and start over.
For the missing 600
If you did not get one or both of the first 2 Stimulus payments you can claim the missing amounts on your 2020 return. It will be listed on your 1040 return on line 30. Check there for it. It either adds to your refund or reduces a tax due.
When you go through the federal review tab it will ask how much you got if any. Enter a 0 in the box if you didn't get one. Or to enter your stimulus payment in TurboTax, type "stimulus" (without the quotes) in the Search box, then click the link that says "Jump to stimulus."
After you have entered your tax information and are ready for the Federal Review, it will be the first question.
If you are trying to trigger it, you can go to Other Situations, answer any questions and click Done. The next automatic selection is Federal Review and it will ask about payments received.
The Recovery rebate credit is on 1040 line 30. It either adds to your refund or reduced a tax due.
