You can't only file one schedule C. You have to file one schedule C for each person considered "self-employed", and divide the LLC income and expenses equally, or you can get Turbotax for Business and prepare a partnership or corporate tax return for the LLC, which will give a K-1 statement for each owner that goes on your personal married filing joint tax return.
https://www.irs.gov/businesses/small-businesses-self-employed/limited-liability-company-llc
(Note for anyone who finds this question in a search: this choice is only allowed for a 2-spouse LLC in a community property state. 2-spouse LLCs in all other states must file as a partnership or corporation and can't use schedule C at all.)
