If you have not received your payment by January 15, 2021 you will claim the credit by answering the 2 questions about the stimulus payments that will appear at the end of the TurboTax interview.
The questions are in the section Federal Review.
Once the information is entered you will see your refund increase or balance due decrease, and TurboTax will enter the amount of the credit on Line 30 of Form 1040 for you.
Please be advised that the IRS has sent a second round of payments out today, January 8, 2021. If you filed a 2019 tax return and received a refund via direct deposit, we encourage you to check with that bank today to see if you were included in this round.