When you pay a bill in QuickBooks, the program issues a check for that payment. Whether you actually print checks using your QuickBooks program, or simply enter payments you've made into the program, you need to familiarize yourself with the QuickBooks check-writing feature. You might write checks for obligations that don't have accompanying bills, such as your rent. If you write hand-written checks, they need to be entered into QuickBooks. The best way to enter these payments into your QuickBooks program is through the Write Checks feature.