We cannot tell you long long it will take the IRS to process the 2019 return you are about to mail. It could take months. Make sure you use a mailing service that will let you know that it was received. A 2019 return is not going to even show up on the IRS refund site--they will only be showing 2020 returns. The IRS is backlogged and there are people still waiting for refunds from 2019 returns mailed months ago. Sorry. All you can do is be patient.
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/state received the return.
Federal and state returns must be in separate envelopes and they are mailed to different addresses. Read the mailing instructions that print with your tax return carefully so you mail them to the right addresses.
**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.**
