If you are married, you will have to file your taxes jointly. This means that the income is split between both spouses. If one spouse makes more than the other, then they will have to pay more in taxes. If you are self-employed, you may not be able to take tax deductions for things like health insurance premiums or retirement savings contributions. This is because of how self-employment taxes work. You can make adjustments to your wages for federal tax withholding if you are self-employed by adjusting the number of allowances on your W-4 form.