It is my understanding that if they were to intercept your return it would be because you owe back child support. It is my belief that this would NOT count towards a current month child support obligation owed. However, I believe your position would be best served by having your child support agreement looked at by a Maryland licensed family law attorney who can perhaps help you to lower the amount of your monthly payments if you can not afford to be making them.
This would not be considered a payment because the flaged and intercepted refund would be applied towards arrears. the only "credit" you would receive would be an over payment of arrears. The office of child support enforcement only has power to intercept for arrears and not for regular or current child support payment. You should contact the office of child support enforcement to review your current account and confirm what amount of arrears, if any you owe.