Its marking of the box "To be refunded" in its 2005 annual ITR constituted its exercise of the option, and from then onwards Rhombus became precluded from carrying-over the excess creditable withholding tax...
Applicability of Irrevocability Rule Under Section 76 of the Tax Code to Refund or Tax Credit Option
UPSI-MI constructively chose the option of carry-over, for which reason, the irrevocability rule forbade it to revert to its initial choice...
The quarterly tax payments are advance payments of the tax due on the entire taxable income of that particular taxable year. Thus, these quarterly tax payments are deducted from the total tax due for the entire year as indicated in the final adjustment return...
For DS metering machine users, the payment of the DST upon loading/reloading is merely an advance payment for future application...