The Oklahoma Notice of Change of Address (CV-28) is a form used by Oklahoma state residents to update their address information on record with the Oklahoma Tax Commission (OTC). This form must be completed and submitted to the OTC when a taxpayer’s physical address changes. There are two types of Oklahoma Notice of Change of Address (CV-28): one for individuals and one for businesses. The individual form is used by individuals who need to change their address on file with OTC for their tax returns and other correspondence from the state. The business form is used by businesses to update their address information on record with OTC for their business tax returns and other correspondence from the state. Both forms require the taxpayer to provide their name, social security number, old and new address, and contact information. By submitting the completed form, the taxpayer is notifying the OTC of their current address.