can't tell you that you'll have a QBI or even an NOL carryover. they differ. you say you have 2 businesses. did the one that was not the start-up have a profit? if so, it is probable that the profit from that one and the loss from the other would be netted for both NOL and QBI purposes. if the result is net income, there would be neither an NOL or QBI carryover. if the start-up loss exceeded the others profit, then you would likely have a QBI loss carryover. as to an NOL that's a different matter and Turbotax does not calculate NOLs
the short version of how to compute a year's NOL is the excess of business losses over business income reduced by the excess of nonbusiness income over nonbusiness expenses, if any. to do it yourself i suggest schedule A on form 1045 which is for the purpose of computing NOL.
https://www.irs.gov/pub/irs-pdf/f1045.pdf
pub 536 worksheet 1 can also be used to calculate NOL
https://www.irs.gov/pub/irs-pdf/p536.pdf
