Either have more withholding taken out of all payments or you can send in quarterly estimated payments. You probably also have interest and dividends that don't have any withholding taken out. Turbo Tax can help you figure how much estimated payments to send in and how to fill out a new W4 for withholding. Maybe one of you should fill out a new W4 as Single to have more taken out. I always claimed Single at work even though I am married.
