There are choices you need to make about filing this year. We normally recommend that you file as Married Filing Jointly. This is often the best option in either getting the largest refund or the small tax due. But we recommend that you look at it both ways to see married filing separately is the best for you.
Be aware that if you file as Married Filing Separately there are credits and deductions that effect how you both file. There are limits on the credits as a way to control possible abuse of the credits. Also, if one of you itemizes the other one may have to even if it is not in your favor.
We recommend that you always consult with a Enrolled or Licensed Tax Professional as tax law changes regularly.