"I write a check to go pay my taxes, and instead of her using it to pay my taxes, she would send me a fake filing of taxes and take that money."
Maybe he was way too innocent! You write a check to the IRS or have federal/state auto-detect. That option is there for sure if filing electronically.
You don't understand how the entertainment business works.
Actors don't get or pay bills, their agent or manager does.
That's part of the justification for taking their 10%: you don't have to worry about anything, anymore. If they were young when they started, it was always like this, and they never learned such basic skills.
Do you think when someone famous drops their phone in a toilet they go stand in line at the Apple store with the normies?
No.
I wonder how many know how to write a check.
More than once I've heard a celebrity explain to an interviewer, "I don't know where the bills go."
Rather than too innocent, I would say let down by his elders.
It may have changed by now (though I doubt it) but this kind of thing was not covered in my high school or college education and nobody else taught me anything about how taxes work, and so when I entered the workforce in my 20s I was subject to a crash course on the subject after I wound up with a surprise bill from the IRS.
Given that he entered the industry at a young age he very well may have not had anybody teach him any better which enabled the accountant to take advantage of him.