REVENUE MEMORANDUM CIRCULAR NO. 80-2020 issued on August 6, 2020 amends the Revenue District Offices (RDO) covered by Revenue Memorandum Circular No. 79-2020 (guidelines in the filing of various returns and payment of tax due thereon of taxpayers under the jurisdiction of National Capital Region, Bulacan, Cavite, Laguna and Rizal during the MECQ) by including RDO Nos. 55 to 57.