In addition to the powers granted to the Director in connection with the collection of the tax imposed under this Subdivision, the Director is hereby authorized and empowered: To make, adopt, and amend such rules and regulations as he may deem necessary or proper to fully collect the tax imposed under this Subdivision and to fully implement exemptions from and refunds of such tax. To audit the records of any vendor to assure compliance with the provisions of this Subdivision. To compromise disputed claims in connection with the tax imposed under this Subdivision. To allow credits to be applied against taxes remitted by a vendor for taxes written off and deemed uncollectible by the vendor. To delegate any of his powers, duties, and functions in connection with the collection of the tax imposed under Section 10-205.01 as deemed necessary. To extend for good cause shown, the time required of vendors for filing any return required to be filed under Section 10-205.01, for such period of time as the Director may deem reasonable.