The Mexican Tax Administration (SAT) has issued Official Letter No. 700-04-00-00-00-2021-131, which was published in the Official Gazette on 10 March 2021. The letter contains an updated list of non-resident digital service providers that have registered under Mexico's new requirements, which generally apply from 1 June 2020. The list, which contained 70 companies in January 2021, now contains…