Thanks for the advice. I had actually called Service Point just before Christmas to get some clarity on which 12th grade marks to submit and how to identify them with the various drop-downs, but the person there seemed rather unfamiliar with the intricacies of the Self-Reporting Form (I think it was a student rather than an admissions officer).
My son’s school has two semesters (first one ends late-January), and each semester has its own ‘final’ grade. Each semester also has two ‘marking periods’ before the final grades are out. These marking periods are like unofficial progress reports. They do not go on any transcript.
The path of least resistance seems to be wait to self report grades until the semester is done in late January, with final marks released early February, but it seems at least some people have submitted these unofficial progress report marks? If so, how would one identify them? Technically, they are not quarters (especially since there are 3 of them), and they do not, in any way, represent a percentage of the final mark (like 0.25 for quarter).
I will try calling again, and I hope to speak to a more experienced person, but the path of least resistance seems to be to wait to self report until February.