这是官方的规则

https://www.nationalmerit.org/s/1758/interior.aspx?sid=1758&gid=2&pgid=434

To enter the competition, a high school student must take the PSAT/NMSQT® at a local high school or approved location in the specified year of high school and meet NMSC's published program participation requirements. 

 

A student who misses the PSAT/NMSQT test due to illness, an emergency, or other extenuating circumstance, but meets all other requirements for NMSC program participation, may still be able to enter the competition. See "Unable to Take the PSAT/NSMQT?" for further information.

 

https://www.nationalmerit.org/s/1758/interior.aspx?sid=1758&gid=2&pgid=1895?

Unable to Take the PSAT/NMSQT?

If you do not take the 2023 Preliminary SAT/National Merit Scholarship Qualifying Test (PSAT/NMSQT®) because of illness, an emergency, or other extenuating circumstance, you may still be able to enter the 2025 National Merit® Scholarship Program.

If the PSAT/NMSQT testing window has not yet closed, see Special Considerations on page 5 of the PSAT/NMSQT Student Guide. You may be able to take the PSAT/NMSQT on another day or at another high school.

If the PSAT/NMSQT testing window has closed, write to NMSC as soon as possible but no later than April 1, 2024, to request another route of entry to the 2025 National Merit Scholarship Program.

The alternate entry request should include your name and home address, the contact information of the person making the request, the name and address of your high school, and a brief explanation of why you were unable to take the PSAT/NMSQT. Do not delay; the earlier you write, the more options you will have for scheduling test dates.

Mail your request to:

National Merit Scholarship Corporation
Attn: Scholarship Administration
1560 Sherman Avenue, Suite 200
Evanston, IL 60201-4897

Your letter must be postmarked on or before April 1, 2024, for your request to be considered.