After you file

I went through the whole amendment process to the point of generating a pdf and was never prompted to enter anything regarding the RRC.  It seems like all of the responses so far are assuming that the amendment tool performs the same RRC final check to verify eligibility and amount but this does not appear to be the case with the amended return. 

I'm using TT Online

From the previous post...

"In TurboTax Online, you are prompted to input the third stimulus check information under Review down the left hand side of the screen." 

Review does not appear on the menu for the Amended Return so I clicked on Other Tax Situations, went through all the prompts and never got to the RRC screen.