Can I still file a W-2 from 2024 if I forgot to file at the time?

[xmasbaby0 · Accepted solution]

You need to amend your 2024 tax return to include that income for 2024.    You cannot stick it onto your 2025 tax return if that is what you meant.  

Wait until your original return has been fully processed before you amend, and make sure you have saved a pdf of the original return before you amend. (If you do not save it as a pdf, the amended return will overwrite the original, and the original will be lost forever)

https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...

Use a mailing service like certified mail  to track so you will know it was received since you will have a long wait.

Do not expect quick results from amending. It can take four months or more for the IRS to process an amended return.  

You can watch for information here:

https://www.irs.gov/filing/wheres-my-amended-return