[DEL CASTILLO, J.]
The CTA En Banc ruled for canceling the assessment notices issued against respondent for having been issued beyond the prescriptive period. It found the first Waiver of the Statute of Limitations incomplete and defective for failure to comply with the provisions of Revenue Memorandum Order (RMO) No. 20-90. Thus: the waiver failed to indicate the date of acceptance. Such date of acceptance is necessary to determine whether the acceptance was made within the prescriptive period; And, the fact of receipt by the taxpayer of his file copy was not indicated on the original copy. The requirement to furnish the taxpayer with a copy of the waiver is not only to give notice of the existence of the document but also of the acceptance by the BIR and the perfection of the agreement. The subject waiver is therefore incomplete and defective. As such, the three-year prescriptive period was not tolled or extended and continued to run.
Petitioner argues that the government’s right to assess taxes is not barred by prescription as the two waivers executed by respondent, through its accountant, effectively tolled or extended the period within which the assessment can be made. In disputing the conclusion of the CTA that the waivers are invalid, petitioner claims that respondent is estopped from adopting a position contrary to what it has previously taken. Petitioner insists that by acquiescing to the audit during the period specified in the waivers, respondent led the government to believe that the “delay” in the process would not be utilized against it. Thus, respondent may no longer repudiate the validity of the waivers and raise the issue of prescription.Respondent maintains that prescription had set in due to the invalidity of the waivers executed by Pasco, who executed the same without any written authority from it, in clear violation of RDAO No. 5-01.
Whether the belated assessment of the CIR is still valid and effective on the ground that respondent is already in estoppel.
Section 203 of the National Internal Revenue Code of 1997 (NIRC) mandates the government to assess internal revenue taxes within three years from the last day prescribed by law for the filing of the tax return or the actual date of filing of such return, whichever comes later. Hence, an assessment notice issued after the three-year prescriptive period is no longer valid and effective. Exceptions however are provided under Section 222 of the NIRC.
Section 222 (b) of the NIRC provides that the period to assess and collect taxes may only be extended upon a written agreement between the CIR and the taxpayer executed before the expiration of the three-year period. RMO 20-90 issued on April 4, 1990 and RDAO 05-01 issued on August 2, 2001 lay down the procedure for the proper execution of the waiver
Due to the defects in the waivers, the period to assess or collect taxes was not extended. Consequently, the assessments were issued by the BIR beyond the three-year period and are void.