Where do I input the 2021 economic impact payment?

The Recovery Rebate Credit will be found in the FEDERAL REVIEW section. ( see "Let's make sure you got the right stimulus amount”)  If you are eligible it will end up on line 30 of your 2021 Form 1040.

Both my wife and I received form 6475 but TT is not asking for it?

I went to other but it still will not

Says I need to add it to my return

During the Federal Review of your tax return, TurboTax will check if you meet the eligibility requirements for the stimulus payment.

1. If you meet the requirements, you'll see the Did you get a third stimulus? screen.
2. Answer a few questions about any payments you've already received and then we'll let you know if the Recovery Rebate Credit applies.
   • If you need to make any changes to your stimulus credit responses, search for stimulus and select the jump-to link to return to the section. Enter your updated info and Continue.

 TurboTax will not take you to the stimulus questions if your adjusted gross income is too high. The IRS does not require those funds to be repaid if your income increases.

@AndyFL