REVENUE MEMORANDUM ORDER NO. 56-2022 issued on December 16, 2022 amends certain provisions of Revenue Memorandum Order (RMO) No. 23-2022, prescribing the standard format in the numbering of deficiency tax assessment notices pursuant to Revenue Regulations (RR) No. 12-99, as amended, and Revenue Memorandum Circular (RMC) No. 3-2022. Item No. II.4 of RMO No. 23-2022 is hereby amended to delete the quoted provision hereunder: “xxx… together with the FAN bearing the amended deficiency tax assessment. However, to effect the issuance of the FFDA/FAN, the protested FAN shall first be cancelled.” Thus, the issuance of Final Decision on Disputed Assessment (FDDA) shall no longer be accompanied by an amended Final Assessment Notice (FAN) and the manner of issuance of FDDA pursuant to RR No. 12-99, as amended, shall be maintained. The hyphen character “-” in the numbering scheme prescribed thereat, separating the Correspondence Type Code (e.g., “P” for PAN), LA Serial Number, Audit Case Number, and Sequence Number shall be replaced with the vertical bar symbol “|”. The LA Serial Number shall now include the alpha characters “eLA” as shown below: P | eLA000000000000 | 000000-0000-0000- 000000 | 00000 Correspondence LA Serial Number Audit Case Number Sequence Type Code Number Effective January 1, 2023, where the Sequence Number shall reset to start again at “00001”, the assignment of this number to a specific assessment notice shall now be based on the count of the correspondence type issued per issuing office. This means that the sequence number in the PAN issued for Case A might be different from the sequence number to be assigned in the succeeding assessment notices such as FLD/FAN or FFDA, if such case reaches this level. Offices which are already using the Internal Revenue Integrated System – Case Management System-Audit (IRIS-CMS-A) module may still use the generated correspondences in the said system and send the same “as is” to concerned taxpayer or edit the document reference number reflected therein to indicate the prescribed numbering scheme. For cases which were created in the Electronic Letter of Authority System (eLAMS), the prescribed numbering scheme must be applied considering that the generation of correspondence is outside of the said system. Any assessment notice issued which reference number is not in accordance with the prescribed numbering scheme shall not render the issued tax assessment notice invalid for as long as the basic requisites such as the factual and legal basis, and details of tax assessments have been indicated.