POTUS should just ignore it.
I mean there is not one word in the US Constitution that requires a President to submit tax returns. Thus, there can be no impeachable offense as a consequence.
Nadler and his lefty judges are wasting everyone’s time.
I agree IF Trump is in possession of the documents he should ignore the ruling and insist that he will only turn them over if the supreme court says he has to. But if the documents are in someone else's possession they may have to turn them over.