I don't follow US politics. How would that help? Legitimate question.
I personally doubt he is, but it’s a more reasonable concern considering how unwilling he is to disclose his financial situation.
Are there people who suspect this who are not qanon or similar nutjobs?
Would a positive cash flow dispel any of that concern? If people are up in arms about what seems to be suspicion, why would anything on his tax return make any suspicion go away?
The idea is that the reason for this secrecy is that he is hiding something which would be politically damaging, such as the long-rumored (and denied) financial links to Russian oligarchs
You cannot authorize a different standard of law to a person without invalidating that law.