IRS Form 720, or the Quarterly Federal Excise Tax Return, is an IRS tax form that businesses must complete every quarter to report and pay federal excise taxes. An excise tax is a tax that the federal government imposes on specific goods or services that are manufactured in or imported into the U.S. Excise taxes are often included in the price of the product, like gasoline or alcohol, so you might not even realize you're paying them. However, if your business sells a good or service that is subject to excise tax, then you are responsible for reporting and paying those taxes; IRS Form 720 allows you to do so.