Ok ... you are fine ... nothing to amend.
You get to use the AOC 4 times on any year where you did not complete a 4 year degree as of 1/1/19 which you did not since you are taking much longer... you must have been below the 1/2 time threshold a couple of years. The rules do not say you must use the credit the FIRST 4 years you are in school however you do need to pay tuition out of pocket and be enrolled at least half-time in a program leading to a degree, certificate, or other recognized credential.
