; and (2) a refund of the full amount of any overpayment of the Guam Territorial Income Tax that the Government of Guam has deemed valid is issued to the person or entity who filed for such refund not later than 90 days after the form for the refund was filed. . 4. Deposit to the Income Tax Refund Efficient Payment Trust Fund The Organic Act of Guam ( 48 U.S.C. 1421 et seq.) is amended by inserting after section 22D the following: 23. Deposit to the Income Tax Refund Efficient Payment Trust Fund Not later than 10 days after the end of each calendar month, the Governor of Guam shall ensure that there is directly deposited into the Guam Income Tax Refund Efficient Payment Trust Fund a percentage of the payroll withholding taxes and income taxes collected by the government of Guam for that month and a percentage of the self-employed payroll withholding taxes collected for the quarter, equal to the percentage of the budgeted forecasted amount set aside for income tax refunds, earned income tax credits, and child tax credits adopted in the Government of Guam’s fiscal year budget, so that not later than 10 days after the end of the calendar year, not less than the amount necessary for income tax refunds, earned income tax credits, and child tax credits for that calendar year shall have been deposited into the Trust Refund Efficient Payment Trust Fund. . 5. Effective date The amendments made by this Act shall take effect on the first January 1 to occur after the date of the enactment of this Act.