You are making this much more difficult than it is ... the allowed NOL from 2017 is added to the 2018 return and it is used against all other income on the return ... there is no HIS/HERS on a joint return. And the S-corp cannot have an NOL of it's own only the 1040 can have an NOL. Seek local professional assistance since the TT program doesn't compute the NOL carryover from 2017 ... you need to compute it yourself.
