Why should he do that ?  The law doesn't require it and Trump supplied all the info he was legally required to submit.  People aren't seeking the truth---they are only trying to find info they can use that they hope and pray can hurt Trump.  Besides , no matter what his returns showed , it would be twisted in the worst possible light. Voters knew before they voted that his tax returns weren't going to be released and they voted for him anyways.  On top of that---wishing and always looking 24 / 7 for the worst in a person---who in they're right mind would list illegal activities on their federal tax return ? Do you really think any politician is going to list payoffs and under the table deals ?   Read the book Clinton Cash .  See how they do it .