The Federal Child Support Portal (FPLS) offers employers a variety of online applications to help them to meet their responsibilities. Employers are essential partners with the child support program.You must immediately make full payment or file a claim form within 15 days. A Guide to an Employer's Role in the Child Support Program. The IWO is the OMBapproved form (PDF) used for income withholding in tribal, intrastate, and interstate cases as well as all child support orders. The NMSN form is issued at the same time a notice to withhold child support is sent to the employer. Employers who fail to respond to the. If the noncustodial parent moves out of New Jersey, the. If so, complete the Employer Response form and return it to the issuing agency within 20 business days. Used to provide employers with information on how to remit child support payments and provides employees with a payment remittance form.