I have not done a partnership form using the online version. What happens with the installed version is that all of the income and expenses are reported at full amounts. The software then uses the partnership percentage to determine net income for each half. Then the vehicle expense is added for the partner doing the taxes (the other partner may have different vehicle expenses) and business use of home is calculated (again, the partner may have different costs). The results are then plugged into your return. It will probably have to be done the same way for the other partner. I'm not sure what happens with spousal returns.
