I'm 100% owner of the LLC, so all income is mixed with my personal. Just need the ability to do itemized deductions including rent.

I just did my taxes with them, and it does have some support for business income and loss, so I think in your case (pass-thru entity) you may be okay- I didn't have to use this section this year as all of my income came from my salaried position this year, so I can't ssay for sure how it works.