Client sold a rental that was his former residence.

Using the basis different basis rules for gain/loss put him in the "in between" zone where no loss or gain to claim.

I can't find a way for ProSeries to recognize this situation "naturally" (ie: can't find check boxes or worksheets for this situation)

I tried to override teh Basis on Form 4797 line 21 but teh software won't let me override that cell.

Am I missing something or am I headed to paper filing?

Thanks