For the affidavit of support, my husband and I will be using our joint incomes. We know that for this we will need to fill out 2 forms, 1 for each of us. Which box do we check for part 1, question one?
a. I am the petitioner. I filed or am filing for the immigration of my relative.
d.I am the only joint sponsor
e. i am the first, or 2nd joint sponsor?
and also, for part 3, question 8, i check the box that i am spnsoring the principle immigrant in part 2 above, and then do i check yes, or no?
You file the form I-864, and your husband files the I-864A. Take a look at the I-864A and things should appear more clear to you.