Trump is a billionaire but it’s a moving target and an ego thing. Like a farmer with 1,000’s acre on paper. Trump has some great properties if he wanted to divest (not fire sale)he would net out well.
Of course Trump is very wealthy, but I don't think he's a billionaire...
Besides that...a tax return won't tell you or me...if he's a billionaire.
Just release the info...and move on.