27 C.F.R. § 31.114
(b) Preparation of TTB Form 5630.5d. All of the information called for on TTB Form 5630.5d must be provided. This information includes the following:
(c) Multiple locations and/or classes of dealers. A dealer required to register at more than one location or for more than one class of dealers must—
(2) Prepare, on the form, or on an attachment identified with the taxpayer's name, mailing address (as shown on TTB Form 5630.5d), and employer identification number, a list showing, by States, the trade name, address, telephone number, and dealer class of each location for which registration is being made. The original of the list must be filed with TTB on or with the registration form, and a copy must be retained at the dealer's principal place of business (or principal office, in the case of a corporate dealer) for the period specified in § 31.191.
(26 U.S.C. 7805)