number for the appropriate point of contact at the Internal Revenue Service to report any error with respect to such payment. (i) Regulations The Secretary shall prescribe such regulations or other guidance as may be necessary or appropriate to carry out the purposes of this section, including— (1) regulations or other guidance providing taxpayers the opportunity to provide the Secretary information sufficient to allow the Secretary to make payments to such taxpayers under subsection (h) (including the determination of the amount of such payment) if such information is not otherwise available to the Secretary, and (2) regulations or other guidance providing for the proper treatment of joint returns and taxpayers with dependents to ensure that an individual is not taken into account more than once in determining the amount of any credit under subsection (a) and any credit or refund under subsection (h). . (b) Treatment of certain possessions (1) Payments to possessions with mirror code tax systems The Secretary of the Treasury shall pay to each possession of the United States which has a mirror code tax system amounts equal to the loss (if any) to that possession by reason of the amendments made by this section. Such amounts shall be determined by the Secretary of the Treasury based on information provided by the government of the respective possession. (2) Payments to other possessions The Secretary of the Treasury shall pay to each possession of the United States which does not have a mirror code tax system amounts estimated by the Secretary of the Treasury as being equal to the aggregate benefits (if any) that would have been provided to residents of such possession by reason of the amendments made by this section if a mirror code tax system had been in effect in such possession. The preceding sentence shall not apply unless the respective possession has a plan, which has been approved by the Secretary of the Treasury, under which such possession will promptly distribute such payments to its residents. (3)