Did she file 2020 yet? It needs to be claimed on the 2020 return. If she filed and it wasn't added to 1040 line 30 she will have to amend 2020 to get it. Was there any amount on line 30?
When you go through the federal review tab it will ask how much you got if any. 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." Say no to the amounts it shows you. Then 2 boxes will open up for each round. If you didn't get one enter a 0 in the box.
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 Federal - Other Tax 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 reduces a tax due.
If you do not get prompted to enter your stimulus information, that means you either:
Filed as a dependent being claimed on another tax return, or
Have an AGI too high to claim the recovery rebate
If you need to amend. How to amend a 2020 return both online and desktop
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-return/01/27439
