Here are your options for filing Schedule C in your personal 1040 tax return:
1. MFJ, one spouse claiming all the Schedule C income and all the SE tax credits.
2. MFJ 2 schedule Cs, one for each spouse with half the income and expenses on each schedule C and each getting SE tax credit.
3. MFS, each spouse claiming half or their separate share of income and SE tax credits.
4. MFS one spouse claiming all the schedule C income and expenses and all the SE tax credit.
For a Qualified Joint Venture, To make this election, divide all items of income, gain, loss, deduction, and credit attributable to the business between you and your spouse based on your interests in the business. Each of you must file a separate Schedule C, C-EZ, or F.
Or Buy Turbo Tax Business and file a 1065 partnership tax return, then enter your K-1's into your Joint or Separate personal tax returns.
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
