You have two choices (1) if your husband is employed he may be able to adjust his withholding to take account of the additional amount that you may earn or (2)  you file and pay quarterly estimated taxes based on what you think you might owe. In either case you would still file a joint tax return. You include both your incomes on the joint tax return, and you also include the quarterly estimated taxes that you've already paid together with the other taxes you or your husband also paid through withholding. 

Your quarterly tax payments are no different than taxes that are withheld from wages and salaries. Both are reported on your joint tax return and count toward the tax that is dues with your tax return.