I did not sign my documents.

[carolyn85russell]

How can I sign my documents on line?

[mesquitebean]

Did you efile?   In order to efile you have to electronically sign the return before it will let you transmit it.  There is no physical signature.   You "sign" on a page that asks for a 5-digit PIN (any 5 digits of your choice),  your birth date, and today's date.   When you enter those 3 things, that is what "signs" your return.   Did you do that, and then proceeded on to transmit the return?

Or see my next comment below for another possibility.

[mesquitebean]

@carolyn85russell 

Or is this what you were ultimately wanting to ask?

Did you already file, but have now printed out your documents?   Is someone like a loan officer asking for a signed copy of your return?   If so, just sign and date it.  I would probably use the date that I had efiled it.