How many times do you need to be absent to repeat the school year

how many times do you need to be absent to repeat the school year

Since you're in high school, they probably gave your parent / guardian a packet at the beginning of the school year that said how many days you'd need to miss to be forced to repeat. There are exceptions for medical reasons, etc, but it's far better to finish the school year than to repeat it.

The time varies from state to state, and since you didn't mention what state you live in, it's hard to say - better to check with your school guidance counselor or similar. Good luck.