After you file

If you did a nontaxable rollover, no amounts will change on your 1040-X if you add that in.

If you e-File 1040-X, TurboTax will resend your entire tax return.

don't waste your 1040-X e-File on a no-change return, you may need it in a month or two if you find some real error.

@krsbozo