(a) A proprietor must file all claims for abatement, remission, credit, or refund under this part on form TTB F 5620.8, Claim—Alcohol and Tobacco Tax and Trade Bureau Taxes. The claim must:

1. (1) Be filed with TTB's National Revenue Center;
2. (2) Show the name, address, and capacity of the claimant;
3. (3) Be signed by the claimant or by the claimant's duly authorized agent under penalties of perjury as provided in § 19.45; and
4. (4) Include any supporting documents required by this part. The supporting documents will be considered a part of the claim.

(b) The appropriate TTB officer may require that the claimant submit additional evidence or documentation to further support the legitimacy or accuracy of the claim.

(26 U.S.C. 5008, 5215, 6065)