Per La. R.S. 9:315.3, the net childcare costs are determined by applying the Federal Credit for Child and Dependent Care Expenses provided in IRS Form 2441 to the total or actual childcare costs. The form may be downloaded from http://www.irs.gov and is available for children aged 13 or younger. This is an addition to the basic child support obligation. Be mindful that your client must produce some sort of proof and that a statement from an in-home provider usually needs further substantiation.