1065 gain or loss from sale of business rental property doesn't flow to 8825:
There's a gain or loss from the sale of business rental real estate property, which should flow to Form 8825, line 19. Instead, the gain or loss is flowing to Form 1065, line 6.
You must enter the amount from the gain or loss that is attributable to business property used in rental real estate activities on the 8825 Worksheet line 18. This amount will then flow to Form 8825, line 19, and it will no longer report on Form 1065, line 6.
