Signing Amended Return?

[liamsmith]

I am ready to file a 2020 Amended return  ...Federal prints a 1040X with attached copy of revised 1040SR ...do we sign both or just the 1040X ???

[DoninGA]

Just the Form 1040-X.  The revised Form 1040SR is not sent with the amended return.

[liamsmith]

TurboTax prints the revised 1040 as part of the return for filing ...how are we supposed to know whether to send it? and why would it do that if we are not supposed to send?

The revisions to it seems to be part of the support for the 1040X changes ?????