I am a former IRS agent teaching instructor with the Internal Revenue Service to give you options on sending Multiple returns to the IRS.
There is absolutely no mandate or instruction from the Internal Revenue Service, the simple answer is as long as IRS gets the tax return it does not make a difference, its simply up to you.
You have the option of stuffing them all in one envelope or filing them in separate envelopes.
The pros and cons of both.
Stuffing them all in one envelope is fine as long as they are marked separate and stapled correctly so when opening the envelope it’s a clear that there are multiple tax returns and tin the envelope.
What we do as a firm.
When we have done this we have put a cover letter inside the envelope in big red letters that says, “multiple returns attached” with the number of years included.
We have never had a problem of IRS getting all the tax returns, never.
Some people do not like that thinking that IRS cannot separate the returns and they insist on filing separate tax returns in each envelope, that s fine too..
There’s nothing wrong with that however if IRS does not get one of the envelopes you can have an issue.
There is no right or wrong. Its your choice what ever you feel the most comfortable about.
Whatever you do make sure each tax return is signed and dated with the blue pen make sure they go in a large envelope (s)and mail all tax returns USPS certified mail with receipt.
Lastly keep all receipts.
A little tax tip is always enclose a check, whether small or full or payment. If IRS said they never received the the tax return but cashed the check you know there’s an issue.
We actually take a picture of the check on top of the tax return and keep them in our clients record for proof of check in the face copy of a tax return.