Am I qualified for the national merit scholarship if I take this test during senior year or is it just junior year or is it both?

best resource for this kind of stuff is your HS college counselor.

Yes, junior-year scores only.

The National Merit Scholarship Program is an academic competition for recognition and scholarships. It is administered by the National Merit Scholarship Corporation (NMSC) in the United States. The qualifications and requirements for the National Merit Scholarship Program can differ based on various factors, including your testing year.

Typically, most students become eligible for the National Merit Scholarship Program by taking the Preliminary SAT/National Merit Scholarship Qualifying Test (PSAT/NMSQT) during their junior year of high school. This is the primary test used to determine eligibility for the program.

However, there are some exceptions and alternative pathways for seniors to qualify as well. For example, students who did not take the PSAT/NMSQT during their junior year but plan to take the SAT in their senior year may still enter the competition by requesting entry through what is called the "Alternate Entry" process.

To get specific and accurate information about your eligibility and the requirements for the National Merit Scholarship Program, it is recommended to visit the official National Merit Scholarship Corporation website or consult with your school's guidance counselor. They will have the most up-to-date and comprehensive information about the eligibility criteria based on your testing year and other circumstances.