@Anarchy Since it's not completely clear what you mean by "upload", I assumed you meant importing. However, I went ahead and revised the above answer to add the manual instructions as well in case you want to enter a 1099 manually now instead of waiting for the import function to be switched on.
But be aware there's no hurry to finish and efile now. This year, due to recent tax law changes the IRS will not begin processing returns until Febuary 12, 2021, and any returns efiled now will just sit on TurboTax servers until then, except for a very small number that the IRS pulls early for testing purposes. If you efile early, and if you later notice a mistake or get an extra form, etc., you cannot retrieve the return to make a correction unless the IRS rejects the return after February 12.
