I am sending a paper 1040X for my client - original was sent e-file. I am thinking all parties, client and myself should sign the form (am I correct?)

[BBS7]

is 8879 required for 1040X not being efiled?

[sjrcpa]

No. 8879 is the efile authorization form. No efile = no form.

But why aren't you efiling it?

[IRonMaN]

But you don't need to sign as long as the software is printing your name in the preparer's signature box.

[sjrcpa]

Your client will need to hand sign the 1040X.