Lost your e.firma KEY file? How to choose your renewal route
Downloading a CER certificate does not recover the private KEY file. For an adult individual taxpayer, the renewal route depends on...
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Clear steps for SAT, CFDI, and tax obligations.
A problem with Mexico's SAT: clarification, a PRODECON complaint or legal defense?
The appropriate response to a SAT problem depends on the document and the right affected. Administrative clarification, a complaint and...
You received a Mexican tax diagnosis: turn findings into documented corrections
A useful tax diagnosis connects each finding to a period, document, difference and next action. Separate confirmed errors from missing...
Mexico Fuel Tax Deduction in 2026: Payment, CFDI, and a Vehicle-Level Audit Trail
A Mexican fuel deduction requires an authorized payment method from the first peso, valid CFDI evidence, a connected vehicle, and...
When Do You Need to Register With SAT? Mexico's 2026 RFC Map for Individuals
Mexico has separate moments for obtaining an RFC, activating an economic activity, and updating existing duties. This 2026 map shows...
Mexico SAT Password in 2026: SAT ID, e.firma, Requirements, and Rejection Fixes
Mexico's SAT Password recovery route depends on whether the taxpayer is an individual with e.firma, an SAT ID applicant, or a legal...
SAT Tax Debt Payment Plans in Mexico: Installments, Deferral, and 2026 Requirements
How to request up to 36 SAT installments or a payment deferral of up to 12 months, including 2026 eligibility, rates, documents, and...