Withholding Tax Forms and Instructions To ensure you are able to view and fill out forms, please save forms to your computer and use the latest. Portal for filling out and submitting Business Personal Property Listings and Extensions.NC-4 Employee's Withholding Allowance Certificate. Documents. Contact Information. Find Local Rules and Forms that provide procedures and guidelines for courts in Mecklenburg County. Withholding Tax Forms for 2017 Filing Season (Tax Year 2016). (Please note the Office of Tax and Revenue is no longer producing and mailing booklets. Attach payment to this return. Make check payable to SCDOR and write the SC Withholding File Number and quarter in the memo. By correctly completing this form, you can adjust the amount of tax withheld to meet your tax liability.