Donald, Here's My Question

So Donald doesn't want to release his tax forms, giving the (phoney) excuse that they are "under audit".  Here's my question, Donald: why not release the most recent year's tax return that it NOT under audit?  Explain why not, Donald.  Especially now that there are legitimate questions about your financial dealings or links with Russia.  Not to mention continuing questions about your real actual charitable contributions.  Why not, Donald?