If you are not a dependent in 2020, you'll be able to claim both stimulus payments as the Recovery Rebate credit on your 2020 tax return.

In TurboTax Online, to claim the Recovery Rebate credit please do the following:

1. Sign into your account and continue from where you left off
2. Click on Federal in the left-hand column, then on Federal Review on the top of the screen
3. On the next page titled Let's make sure you got the right stimulus amount, click on Continue
4. Follow the interview
5. TurboTax will determine whether you are entitled to any additional stimulus
6. Any stimulus amount remaining due to you will show as a credit on line 30 of your form 1040.

what if I decide not to file with TurboTax? What sort of paper work would I need to show? I read something about having to need a letter from the IRS about the payment you received. I didn’t receive any letter which I’m guessing the people who got their stimulus but just didn’t receive the full amount only got.

I'm not sure what documentation you would need to provide to a tax return preparer, but the IRS knows how much stimulus money they sent you, so if you enter the wrong amount they would adjust your tax refund accordingly. So I wouldn't think you'd need any paperwork supporting your stimulus payments, unless you were applying for a refund anticipation loan.

Thank you! Another thing if I were to file my taxes on turbo tax would it be possible to do the Recovery Rebate Credit with just the Basic Live Turbo Tax option or would I have to upgrade the service? Also I wouldn’t have to pay the money back I receive right? or this wouldn’t effect my credit would it?

No, the Recovery Rebate Credit is included on the Basic Edition; no upgrade needed for that credit. 

No, there is no payback option and receiving a tax credit will not affect your credit files.