You do not have to file tax return as you were not in the US last year. Your hu*****and can not claim you as dependent. To file married jointly if you believe your marriage last forever. To file married seperate if you are afraid of that you will seperate with your hu*****and and he will not pay his tax liabilities when you two leave each other(divorce). (married jointly both parties are responsible for the tax and if one don't pay, the other one will have to pay all)