The Tax Administration Service of Mexico (SAT) has announced that it will allow, until May 15, 2018, the correction of CFDI of Payroll (CFDI de Nomina) issued during 2017. For that purpose, SAT issued a new Rule 18.104.22.168 in the First Modification of the Miscellaneous Fiscal Resolution for 2018. As a result of this provision, taxpayers who issued CFDI de Nomina with errors or omissions during 2017 will be able to correct them without any penalty, if the new CFDI correcting the old one is issued no later than May 15, 2018. In other words, the new CFDI is deemed to be issued in 2017 for all legal purposes. The above mentioned Miscellaneous Resolution can be found, here.