Locate the confirmation number given to you when you scheduled your GRE test. You will need this number when rescheduling computer and paper-based exams.
Visit the Prometric website (see Resources). Prometric Services is a global testing and assessment provider. Click the down arrow next to the menu entitled "Academic, Professional, Government & Corporate." Select "GRE: Graduate Record Examination" from the menu.
Click "Start" button located inside of the "Getting Started" box. Before selecting start, you will see the option to reschedule your test on the menu.
Select the country where you registered to take your test. Once you make your selection, a box will pop up with a link that reads "Register Online for the Computer-based General Test." Click this link.
Use the drop- down menu to choose the state where you registered to take your GRE and click "Next."
Select the link that reads "Reschedule or Cancel an Exam." You will be taken to a page where you will enter your confirmation number and the first four letters of your last name. Type this information in and click "Next."
Reschedule your test date and time. Pay the rescheduling fee and get your new confirmation number.