Hello Aspirant! If you've attempted all the papers of 12th in both the years that is in 2021 and in 2022 then the marks of the latest will be valid and counted. So you should give the marks of all the subjects in your 12th board examination of the year 2022. That will be valid and fair. You can attempt the JEE main exam four times a year that is in March, April, May and June.
Hope this helps!