With my new job I can take your typical tax deductions for business owners, auto expenses, office expenses, etc. Using round numbers say we paid in $20,000 in taxes out of DH's paycheck. If our regular deductions (house, kids, etc) and my business deductions come to say $25,000, do we get a $5000 refund? Basically I am trying to figure out if I need to take the time to figure out how much we spent in utilities, etc. this year to deduct my home office expenses. With our rental property and my business deductions we will be at an effective tax rate at or very close to zero already. If our effective tax rate is say -10%, do we get that 10% back?

