Form 2363, Master File Entity ChangeThe example displays a completed Form 2363 (revision date of 8-2019). The example shows a request for an SSN change. The From section of the Form 2363 contains the taxpayer's Name Control, their SSN and an X beside the Trans Code 011 field to indicate a EIN or SSN change is necessary.The To section of the Form 2363 displays the new/replacement taxpayer information. This example contains the applicable taxpayer Name Control, an X beside the SSN field, the replacement SSN and a 1 in the FSC field.The Form (in the areas that contain Prepared by, Org. symbols, Area Office, Prepared From (Document and DLN) and Routing to information, contains a representation of the preparer request (received in the Entity Control Unit (ECU)).