I completed my tax returns with Turbotax 2019 in April and filed the state(MD) return and received my refund. Now I want to efile the federal, but I cannot get at the completed return in Turbotax 2019. I saved the return in pdf, but i cannot efile from the pdf. When I log into turbotax, I think that I must have 2 identities as it tells me I have no return with the one I try and, unfortunately, I no longer can find the requested serial number from the download. I have a "real" (downloaded) copy of TurboTax 2019 Premier on the Mac, which loads all the updates every time I try to access. Please advise. TIA