I made an error on my tax form one year causing the IRS to say I owed a whole year of taxes, and I was able to resolve it amicably even after they realized they weren’t going to be getting any money from me. When you are in accounts payable, the service does get better.
I’m in one of those now again because we forgot to file the 1099s for the RSUs sold to satisfy my wife’s ordinary income tax on RSU grants. Of course, since it was sold to pay ordinary income tax the cost basis adjusts all the way up, they haven’t gotten back to me yet.