Incorrect W-2 from Employer who uses Paychex who are not responding.

My employer uses Paychex for payroll and they issued an incorrect W-2 that incorrectly reports my salary almost $25,000 extra. We notified them in a couple of weeks before the April 2025 tax deadline. I filed an extension and paid taxes calculating based off my correct salary.


It's now been months of repeatedly trying to get them to issue a corrected W-2 with no response or fix, and the Oct 2025 extension deadline is approaching.

 

I don't want to file and have to pay taxes on an incorrect extra $25,000 for Paychex's error, but I'm afraid not matching what the goverment has for my W-2 will flag me or cause a ton of headaches.

 

What is the best course of action to take at this point Mid-Sept?