If the Collector is not satisfied with the return
and payment of tax made by any taxpayer or supposed taxpayer under
the provisions of this article, he is hereby authorized and empowered
to make a determination of the tax due by such person, based upon
the facts contained in the return, or upon any information within
his possession or that shall come into his possession, and for this
purpose, the Collector, his deputy or his authorized agent is authorized
to examine the books, papers and records of any such person to verify
the accuracy of a return or payment made under the provisions thereof
or to ascertain whether the taxes imposed by this article have been
paid. The Collector is hereby authorized and directed to make and
keep such records, prepare such forms and take such other measures
as may be necessary or convenient to carry this article into effect.