I have to submit my taxes by mail, do I attach a copy of my W2 or do I send the original?

[DoninGA]

Either a copy of the W-2 or the original would be acceptable.  So just send a copy and keep the original with your tax records.

[TomK2023]

If you are going to mail your return it will print out with mailing instructions that tell you what to include and where to mail it.

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.  Send a copy; keep the original for your records.  

Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS/state received the return.

Remember that federal and state returns must go in separate envelopes to different addresses.