I have a turbo Tax Business and need to report a disposition of a Partnership asset with section 179. I already entered the information on Box 20, Code L but is not populating the supplemental information report on the disposition.

Your K-1(s) should show "STMT" (Box L) and there should be a supplemental K-1 179 Report.

That statement is not there! 

Need more details. 

Did you dispose of the asset in the program? If so, did you indicate you previously took a Section 179 deduction and enter an amount?

Yes I did.

Are you looking in Forms Mode below the K-1(s)?