@Harry51 So you are doing a favor for a new son in law who has not filed returns in a few years? You can use wage and income transcripts for federal information but those will not help you with state tax information if he is in a state with a state income tax. He could do some "homework" himself to seek copies of past year W-2's and 1099's. He could phone, email, snail mail or drop in on past employers to ask for copies of W-2's. He could seek copies of past 1099's from banks or financial institutions that issued them.
Each tax year has to be mailed separately. Do not put them in the same envelope or you risk that the IRS will overlook one. His 2019 needs to be sent before April 18, 2023 or he forfeits that refund.
Of course, if he owes tax due, the IRS will bill him later for penalties and interest. TurboTax will not calculate the penalties or interest. The IRS does that when they receive his return.
Ultimately, you are doing your new SIL a huge favor. His lack of saving tax documents and records is on him. So do the best you can to send in as much as possible and see what the IRS does with all of it. HE must sign and date each of those returns and mail them in. They cannot be e-filed.
Only a paid tax pro can e-file some past year returns. It cannot be done using the do-it-yourself TurboTax software. You could, of course, suggest that he go to a tax pro and pay for them to help him.
**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.**
