Open your Web browser and go to the PSAT high school search page.
Type in your school's numeric identification code -- you can get this from your guidance counselor -- or type in your school's name and address. Click "Search."
Click your school's name in the Search results. This will load a PSAT registration page that is unique to your school. Select the date on screen from the list of options for when you would like to take the test. Click "Register" to begin the registration process. You will have to provide your name, address, and credit or debit card number to pay the registration fees, which vary based on the school.