OK ... let me break it down for you so you see why you cannot use the AOC any longer ...
You attended school in 13, 14, & 15 and got your 4 year degree in 2015.
Now it is 2019 and you go back to school for another degree ... qualifying question #1 is : As of 1/1/19 did you already complete a 4 year degree ? The fact that you only took 3 years to get the 4 year degree is immaterial ... the fact is you do have a 4 year degree already ... so NO AOC for you. All you can use is the Lifetime Learning Credit.
This also holds true for high school students that do the dual enrollment and graduate HS with an AA degree ... then it only takes 2 school years to get the bachelor degree so they can only use the AOC for 3 times due to the school year spanning 3 tax years.
