We had that happen the first year we were married. With our accountant -- my MIL.
My MIL isn't my accountant, but still has a shared investment account in DH's name so we're always stuck waiting on her for tax documents every year. She's a tax procrastinator. I'm a let's-do-taxes-in-January-er. It is horrible.
I would recommend never ever letting any personal relationship
get involved in your relationship
with the IRS. Hurt feelings are one thing, incorrect tax filings are another. It's a terrible plan to let one interfere with the other.