TITLE 26 - US CODE - PART I - SPECIAL (OCCUPATIONAL) TAXES

26 USC 5801 - Imposition of tax

(a) General rule 
On 1st engaging in business and thereafter on or before July 1 of each year, every importer, manufacturer, and dealer in firearms shall pay a special (occupational) tax for each place of business at the following rates:
(1) Importers and manufacturers: $1,000 a year or fraction thereof.
(2) Dealers: $500 a year or fraction thereof.
(b) Reduced rates of tax for small importers and manufacturers 

(1) In general 
Paragraph (1) of subsection (a) shall be applied by substituting $500 for $1,000 with respect to any taxpayer the gross receipts of which (for the most recent taxable year ending before the 1st day of the taxable period to which the tax imposed by subsection (a) relates) are less than $500,000.
(2) Controlled group rules 
All persons treated as 1 taxpayer under section 5061 (e)(3) shall be treated as 1 taxpayer for purposes of paragraph (1).
(3) Certain rules to apply 
For purposes of paragraph (1), rules similar to the rules of subparagraphs (B) and (C) of section 448 (c)(3) shall apply.

26 USC 5802 - Registration of importers, manufacturers, and dealers

On first engaging in business and thereafter on or before the first day of July of each year, each importer, manufacturer, and dealer in firearms shall register with the Secretary in each internal revenue district in which such business is to be carried on, his name, including any trade name, and the address of each location in the district where he will conduct such business. An individual required to register under this section shall include a photograph and fingerprints of the individual with the initial application. Where there is a change during the taxable year in the location of, or the trade name used in, such business, the importer, manufacturer, or dealer shall file an application with the Secretary to amend his registration. Firearms operations of an importer, manufacturer, or dealer may not be commenced at the new location or under a new trade name prior to approval by the Secretary of the application.