I’m a U.S. Citizen and my husband is on a H1B visa, we are going through the process of applying for his green card, I need the 1-865/864 but I am currently unemployed, but I am able to show tax returns for the last 3 years. Is there a way to use my husband’s income to fill the I-864 without going for the joint sponsor option? If not, what is the cost and what additional forms do I need?