Per Turbotax line 15 Column A on the 1040x will not include any recovery rebate (stimulus check) amount. Part of the reasoning is because the IRS will automatically adjust the recovery rebate amount on your 1040 if the calculation was done incorrectly so there isn't a need to amend the recovery rebate amount. But if you had a change in AGI then the 1040x would have any recovery rebate adjustments on line 15 column b and c of the 1040x.
