@maglib @rjbran I'm in the same situation. I do need to amend because I received a corrected 1099, as well as a K-1 I didn't know was coming when I filed. I also forgot to include one of my estimated tax payments to both fed and state, but both IRS and CA FTB have already updated those parts and sent me a refund. I managed to figure out how to properly account for that on the amended return, so now just owe a small amount to cover the additional income. I've already efiled my state amendment, and had it accepted, so I'm just waiting on this issue to efile the federal return. As I understand it, I don't have to do that by the 15th, but I'm worried the IRS might start wanting late payment pentalties if I don't pay the difference soon.
