G.R. No. 172129 September 12, 2008
COMMISSIONER OF INTERNAL REVENUE, Petitioner, versus MIRANT PAGBILAO CORPORATION (Formerly SOUTHERN ENERGY QUEZON, INC.), Respondent.

FACTS

Respondent Mirant Pagbilao Corporation (MPC), a power generator, sold electricity to the tax-exempt National Power Corporation (NPC). Believing its sales were zero-rated for Value-Added Tax (VAT) purposes under Section 108(B)(3) of the Tax Code, MPC filed an application for effective zero-rating in 1997. While awaiting approval, it paid Mitsubishi Corporation the VAT on progress billings for plant construction, amounting to PhP 135,993,570, on April 14, 1998. MPC then filed its VAT return for the second quarter of 1998, reflecting input VAT of PhP 148,003,047.62, and subsequently sought a refund for this unutilized input VAT.
The Commissioner of Internal Revenue denied the claim, arguing that MPC’s sales were not zero-rated due to its failure to secure a prior approved application for zero-rating, citing the Kumagai-Gumi case. The Court of Tax Appeals (CTA) partially granted MPC’s claim but disallowed the PhP 135,993,570 payment to Mitsubishi, finding the supporting Official Receipt dubious as it was issued years after the supposed payment period (1993-1996). The CTA allowed a refund of only PhP 10,766,939.48. The Court of Appeals reversed the CTA on this disallowance, ordering a full refund including the Mitsubishi VAT, prompting the Commissioner’s appeal.

ISSUE

Whether the Court of Appeals erred in granting MPC’s claim for refund of input VAT, specifically by reversing the CTA’s factual finding that the Official Receipt supporting the PhP 135,993,570 payment to Mitsubishi was dubious.

RULING

The Supreme Court granted the petition and reinstated the CTA decision. The Court emphasized that the CTA, as a specialized court dedicated to tax matters, its factual findings are accorded the highest respect and are generally binding, especially when supported by substantial evidence. The CTA meticulously evaluated the evidence, noting that Official Receipt No. 0189 was issued in 1998 to cover VAT for billings from 1993 to 1996, creating serious doubt about its authenticity and the actual timing of the payment. This finding was not baseless but was a reasoned conclusion from the evidence on record.
The legal logic is clear: a claimant for tax refund bears the burden of proving not just the legal entitlement to zero-rating but also the factual basis of the claim with competent and credible evidence. The CTA found MPC’s evidence for the largest component of its claim to be unreliable. The Court of Appeals overstepped its authority by overturning this factual determination without a clear showing that the CTA’s findings were unsupported or constituted a grave abuse of discretion. Therefore, the Supreme Court upheld the CTA’s disallowance of the PhP 135,993,570, limiting the refundable input VAT to PhP 10,766,939.48 as originally computed.