Why am I only deducting $368 from student loans when I paid $2660 in interest to student loans this year?

The usual reason:

For 2024, the amount of your student loan interest deduction is gradually reduced (phased out) if your MAGI is between $80,000 and $95,000 ($165,000 and $195,000 if you file a joint return). You can't claim the deduction if your MAGI is $95,000 or more ($195,000 or more if you file a joint return).