All above answers are wrong! No need for Biz tax form
It used to be as they described - you need file biz tax and generate 2 K1s then pass on to your individual tax returns. However, since 2006, IRS had a new rule that favors small biz such as hu*****and and wife LLC.
Now you can continue use your personal tax return, but you need to create two separate schedule Cs - one for you and one for your spouse. You split both rev and expense depending on your predetermined LLC shares.
In this way, you can avoid extra biz tax return (accountants love that!).