There are a few tax rules that affect everyone who files a federal income tax return. This includes the rules for dependents and exemptions. The IRS has seven facts on these rules to help you file your taxes.1. Exemptions cut income. There are two types of exemptions: personal exemptions and exemptions for dependents. You can usually deduct $3,900 for each exemption you claim on your 2013 tax return.2. Personal exemptions. You can usually claim an exemption for yourself. ...