Not that I doubt your sincerity

but do you really think a screenshot of deposits to your checking account constitutes proof of anything?

If you respond back next year, as you’ve now said you will, how about you prepare your Schedule C (the business portion) of your tax return. You can black out the personal stuff, like your S.S. number. That way, everyone can see your income and expenses and write-offs.

That would be much better documentation than a checkbook ledger or a bank statement.