In many households, married couples divvy up the responsibilities; one will handle the bills and banking while the other cooks and does the grocery shopping, or one will do the laundry while the other manages the yardwork and house. This split often extends to annual income tax responsibilities, even in couples who use a professional preparer. However, when couples submit joint returns, both are jointly and severally liable for the information included in the return. That means if there’s an underpayment, both spouses are going to be liable for the debt.