Filing fees are paid to your tax preparer, not the IRS. They certainly don't appear on the bottom line of your return.

It's not so much they don't care he's lying, it's that they find excuses and distract themselves into believing everyone else is just as bad. "But- Hilary's emails! Hunter's laptop!!"

I do think they if some obnoxious strongman who supported progressive views and was a savage animal who was corrupt as hell, many democrats would love him. If he threatened to put right wing ideologue opposition in prison, they would like that too. That's your answer to a lot of his support.