If is Modified Adjusted Gross Income is over 400% of the Federal Poverty Level, yes, he needs to repay that $19,020 in Advance Premium Tax Credit.

For the calculation of the 400%, you also need to add in the non-taxable social security.

---

@JimmyTheMan wrote:

Both a man and his ex wife are the recipient of the 1095A 

Are both of them listed on ONE 1095-A?  If so, they REALLY, REALLY want to allocate 100% to the wife who had no income.  See Allocation Situation #1 in the Instructions.

https://www.irs.gov/pub/irs-pdf/i8962.pdf#page=16