Use this worksheet when (a) Parents share custody of all the children for whom support is being determined, or (b) when one parent has primary physical custody. Call (Option 7).Employers paying cash under the table do not fill out quarterly or annual tax forms. And, they do not record employee wages on Forms W-2. Use this worksheet when one parent (or a third party) has primary physical custody of all of the children for whom support is being determined. Our lawyers have a wealth of experience with all types of child support matters and are happy to speak to you about your personal situation today. It takes time and legal cost. You can file a motion to enforce child support. To use the North Carolina child support calculator, fill out the fields below and click the next button when you have finished. It tells you how to fill out the right forms, prepare for trial, handle the trial, and follow through on the judge's decision.