Not sure what you are trying to do. You cannot "file a 15 year old W-2" for a tax refund. You are too late to receive a refund for any tax year earlier than 2017 ( and even that is very iffy).
If you have a W-2 for 2020 you can put it on a 2020 tax return -- or if you are now working for an employer who will issue a W-2 in January for 2021 you will put that on a 2021 tax return next year.
W-2's come from your employer. If you worked in 2020 and did not receive your W-2 then contact the employer to ask for another copy.
**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.**
