If it is determined through a paternity test that you are not the biological father of the child, you may be able to seek a refund of the child support payments you have made. If you can provide conclusive evidence that you are not the father, the CMS may typically refund previous child maintenance payments from the date you told the CMS you were not the child’s parent. However, this will depend on the specific circumstances of your case. Therefore, it is always advisable to consult with a legal professional to understand your options and the process involved.