Yep, perfectly fair to criticize Trump on not releasing his taxes when he said he would. If that costs him your vote, it’s his loss. As far as I know, he hasn’t been accused with any evidence of tax fraud. Perhaps plenty of other fraud, but not tax fraud. The IRS and FBI haven’t prosecuted him yet, and I’m sure they have access to his records.
Biden has released his taxes which is good. He wasn’t legally obligated to do it anymore than Trump is, but it’s good he did. My point is if the allegations of international payments to his son and other family members were part of a money laundering scheme to buy influence and that Joe Biden actually received that money, then he will have filed fraudulent tax records. Remember, the mob (ex Al Capone) was largely stitched up on tax fraud, not all the other crimes they committed.