I don't see anything about additional taxes, but there are some pretty concerning parts in it. https://www.congress.gov/bill/116th-congress/house-bill/5717/text?q=%7B%22search%22%3A%5B%225717%22%5D%7D&r=1&s=1#toc-H80B74C01E3404F4DBD03D4A21098DBD0 >Establishment Of Federal Firearm Owner's License.— >“(1) IN GENERAL.—The Attorney General shall issue a Federal firearm owner's license to any individual who is eligible under subsection (b). >“(2) ISSUANCE OF LICENSE OR NOTICE OF DENIAL.—Not later than 40 days after the date on which an individual submits an application for a Federal firearm owner's license under this section, the Attorney General shall— >“(A) determine whether the individual is eligible to possess a license under this section; and >“(B) based on the determination under subparagraph (A)— >“(3) EXPIRATION.—A Federal firearm owner's license issued under this section shall expire on the date that is 10 years after the date on which the license was issued.