No, I don’t think that he fills out his own form. However, with 12,000 to fill out, it would be nearly impossible for anybody to be perfectly in compliance.
And re your other patently ridiculous statement, re errors made by a battery of THE best of the best CPAs and lawyers...HOGWASH!
It is faaaaaaaaaaaaar more likely that some pencil necked moron, in the IRS, making a mistake/s than the CPA/person who filled out even a relatively simple tax return...let alone something as complicated as Trump's tax returns.