I received a K1 for a publicly traded partnership (UCO) after I filed so I am doing an amended return. Schedule K1 - Box 16 indicates that a K3 is attached, but it will not be available until August 31st. I have tried to just leave everything blank in the K3 sections TurboTax asks for, but this prevents me from e filing. There is not foreign taxes paid per box 21 on the form. Any advice on what to do since I feel a little uncomfortable unchecking box 16?
