Mandatory Master File, Local File, and Informative Return
January 1, 2025
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Mandatory Master File, Local File, and Informative Return
Multinational groups and domestic taxpayers must file the annual Informative Return on Related Parties (Annex 9 of DIEMSE), with Master and Local File documentation due by the tax return deadline (generally March 31 of the following year). These must meet the extensive SAT and OECD content requirements.
Source:
OECD: Mexico Master File/Local File Requirements