Indicate whether or not you prefer to credit this to next year, or have this overpayment refunded. Allow 90 days for processing of a refund.Allow 90 days for the processing of a refund. Open the Application for Refund; you may fill it out online, but then you must print the completed form. Sign the form in the presence of a Notary Public. Refunds for overpayment of tax must be requested in writing. Mandatory Withholding Tax Tax is required to be withheld for employees working in the City. Generally, the taxpayer must try to correct the withholding with the employer, before submitting Form 843​. WHEREAS, the Tax Collector of the Township of Franklin, County of Gloucester, State of.