If you have the desktop software for 2017 and 2018 then he can use your computer to prepare his returns. A 2017 return cannot be e-filed. It must be printed, signed and mailed.
When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS received the return.
He can use your 2018 software to prepare a 2018 return. With desktop software you get up to five federal e-files so if you have not used up your limit of five, he can e-file his 2018 return. If you have used your limit then he needs to print, sign and mail 2018.
**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.**
