if you file on paper, you’ll be waiting for a long time.
it is also not a mitzva to have a refund. It means that you volunteered to pay in advance to the government – money that you could have spent on tzedoka or your family – and now you are nicely asking to please give it back to me. IRS is surely following a halokho that in a case of sofek, the money stays in place, at least when it is you asking for money. So, plan accordingly for the next year.