Is it possible to prepay taxes, as President Trump claims he did?

Analysis: Donald Trump gave a(nother) nonsensical answer on his tax returns More than five years into his life as a politician, President Donald Trump still has no good answer on why he continues to refuse to release any of his past tax returns. Like, none.
Analysis: Donald Trump just revealed *a lot* more than he meant to about his tax returns
President Donald Trump is the only modern American president to never release any of his tax returns -- either while running for office or during his time in office. He's offered a series of explanations for why that is, including that he is under audit b