If you e-file your return you do not have to mail anything. It has all been done electronically. You "sign" by entering your 2019 AGI from line 8b of your 2019 Form 1040 so there is no physical signature on an e-filed return.
If your state is one that requres a copy of the federal return that is also taken care of if you e-file the state return.
You should print out a copy of the filed return for your own records, and save the tax file and the pdf of the return. And...keep copies of your documents like W-2's, 1099's etc.
**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.**
