Retesting
If you encounter an issue on test day that makes you want to consider canceling your score, you may be able to work with your school to retest later in the testing window. (For more information on canceling scores, please see 4(e) Test Taker Reporting Violations or Suspicious Behavior in the Digital PSAT/NMSQT Testing Rules.)
Contact your school's test coordinator immediately to report any issues you encountered on test day.
If you do not want your PSAT/NMSQT Selection Index score used for participation in the National Merit Scholarship Program, you must contact NMSC immediately. See the NMSC site for further details.