HERO loan interest deduction on property taxes pain in 2018 and 2019

I have a HERO loan in California.  The annual payment is on my property taxes and I paid part of my taxes in 2018 and part in 2019.

I think I can deduct the interest portion of the HERO loan.  There is no 1098 form from the HERO program. I do have a table provided by the HERO financer that tells me how much the annual interest amount it.

Do I treat the interest deduction like a property tax and claim part in 2018 and part in 2019, do I treat it like a property loan and deduct the interest in the year it was charged, or is there a hidden option #3?