It would come out basically the same, I believe.
If you had, after the first two months of 2015, gone to the site and adjusted your income upwards, your APTC would have been lowered, and your premium would have jumped way up.
You’d have paid the money anyway, I think.
You would just have been paying a much higher premium every month with a corrected income number.
Nowhere that I know of is there any instruction to notify the HC MP of an changes, but for marriage, death or divorce...........