Ensure your VA certifying official submits the most accurate amount of training time required in order to achieve CPC.( Usually the cumulative amount of training hours required in months). The VA will give you a lump sum for "books and supplies" in your first payment of BAH. so if they submit it takes a year to certify but you do it in 6 months you're liable to pay back the other 6 months of stipend to the VA. However I believe they prorate the amount to less if you aren't going to train for the full year