If your child support order states that it ends upon the child turning 18, or completing secondary school, you may just stop paying child support in the first month after she graduates. However, if there is an income deduction order in place, you may need to get an order from the court to stop that deduction from coming out of your paycheck. If that is necessary, you should seek the help of a Family Law Attorney.
I am exclusively a family law attorney, practicing primarily in the metro Atlanta, Georgia trial courts. However, I handle appeals from anywhere in Georgia.
While child support obligations are supposed to automatically terminate upon the occurrences indicated within the order, there are circumstances wherein obtaining an order of termination would be required. If you fall within such a circumstance (e.g., subject to an income deduction order) or if you just want to be on the safe side, you would need to file an action to terminate child support. You do not need to wait until May to file such an action, and can ask that the order give a date certain when support is to terminate.
~ Kem Eyo
The above answer is a general explanation of legal rights and procedures. It does not constitute legal advice. Nor does it establish an attorney-client relationship between the individual posting the question and the attorney providing the answer.