You might need to file 2 Schedule Cs. Here's some IRS info
IRS info on Husband & Wife joint venture
http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/Election-for-Husband-and-Wife-Unincor...
Husband and wife joint business
http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/Husband-and-Wife-Business
