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Clear steps for SAT, CFDI, and tax obligations.

Taxpayer classifying the causes of a Negative Compliance Opinion from the SAT.
Compliance Opinion8 min read

Negative Compliance Opinion: Causes Reviewed by the SAT

Classify the cause of a Negative Compliance Opinion before filing, paying, or clarifying; each inconsistency requires different evidence.

Fintax Team · Aug 24, 2026Read guide →
Analyst calculating ISR and VAT withholdings for fees and rent.
Withholdings12 min read

ISR and VAT Withholdings When Paying Fees or Rent

Before paying fees or rent, identify the parties, concept, base, and obligations to correctly calculate and remit withheld ISR and VAT.

Fintax Team · Aug 8, 2026Read guide →
Landlord reviewing contract, CFDI, and tax returns for a property.
Leasing13 min read

Leasing for Individuals: ISR, IVA, CFDI, and Tax Returns

Guide to managing ISR, IVA, CFDI, withholdings, and deductions when an individual rents out a home, commercial space, warehouse, or office.

Fintax Team · Aug 4, 2026Read guide →
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