I sounds reasonable to me but why do the instruction on IRS.gov say
To complete Form 1040-X, you will need:
Form 1040-X and these separate instructions;
A copy of the return you are amending (for example, 2021 Form 1040), including supporting forms, schedules, and any worksheets you completed;
Additional supporting forms, schedules, and any worksheets for the return you are amending that you will need to complete to show your changes;
