you have two choices and no other really. Either you file two SCH C's as a part of your joint tax return. Or you can file a 1041 partnership return which will issue a K-1 to each partner which each partner will then use for completing their joint tax return.
Your only other option is to make it a sole proprietorship by removing one of the owners from the LLC. Then for example, in even numbered years the husband claims all the income and expenses and gets all the medicare and social security credit. THen in odd numbered years the wife owns it and she gets all the medicare and social security credit. Of course, that only balances out provided there is a real, taxable net profit every year. So that's why the 1041 partnership return may be the better (and easier in the long run) way to go.
