Addendum to past post. I think there might be a program bug / error with my case with current Turbo Tax Premier for 2021. One of the questions in form 6252 asks if the residence home sold is the "buyer's primary home" which is not, so I did not mark the box in question. This put me down a different program path that did not allow me to add amount up to the $250K exemption. Turbo Tax then flags (8) Federal errors in final review of data. I can then manually override form 6252 to update the $250K exemption amount to get a net "zero" capital gain on this installation sale. Net result Turbo Tax now printout shows Schedule "D" with net gain of zero; update to Schedule B seller finance mortgage interest information from form 6252 and does not print form 6252. Schedule B has a second abnomality / bug that does not round interest nor dividend values but gives full dollar and cents amounts.
