The IRS might be very interested in what your ex employer has to say. If he hasn’t been properly withholding taxes, you’ll ultimately be responsible. And obv don’t pay a dime. You might actually be looking at some windfall for whatever fines BOLI ends up charging him.
In my experience, most employers, and landlords, count on you not knowing your rights and their status as authority to get away with shit like this.
Information about Form 3949-A, Information Referral, including recent updates, related forms and instructions on how to file. Use Form 3949-A, Information Referral to report alleged tax law violations by an individual, a business or both.