Yes, this will need to be entered into your return as the IRS will reconcile the payments on your return. There will be a pop-up question as part of the Federal Review section in TurboTax for all returns to ask if you received a 3rd stimulus payment and if so, how much was the payment.
If you wish to go there directly, you can use search at the top right, by clicking on the magnifying glass and entering "stimulus" in the search box. It will return help articles and you can click on Jump to Stimulus link to access it directly.

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