When you e-file there is no physical signature. You "sign" electronically by entering your AGI or PIN. If you file by mail then you use a pen and sign it and date it by the words "Sign here" on page 2 of the Form 1040. If it is a joint return then both spouses need to sign and date it.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
