Until 30 June 2022, both CFDI versions 3.3 and 4.0 can be used. Version 4.0, which will be used exclusively as of 1 July 2022, comes with updates that include:     Registration of multiple related invoices Updates to cancellation methods Ability to include export information   Pagero has provided additional information regarding the transition from CFDI version 3.3 to version 4.0 in previous publications.   Read the full announcement from the Mexican Tax Authority here.