Form 8990 how do I know if I need to attach this form that TurboTax does not support?

[Ciao4]

I was entering information from the K-1 that the Partnership I invested in sent me. I am a limitrd Domestic partner.

In box 13 I have Code K $2 Excess business income.

I have no clue what do to Form 8990 which is Limitation on Business Interest expense Under section 163(j).

This is the first year I have a PTP.  Do I really need to attach Form 8990 to my return?

HELP.  I guess it is time to go to a professional tax preparer.