Local compliance context

Practical context for evaluating local record-keeping and billing requirements without treating them as universal.

2 articles

SAF-T Portugal structured tax data file illustration

SAF‑T (PT): what it is and why it is so important in Portugal

SAF‑T (PT) is a standardized file in XML format that contains essential accounting and invoicing information for a company. It was born from an OECD recommendation (“Standard Audit File for Tax Purposes”) and was adapted to the Portuguese reality by the Tax Authority (AT).

SimpleSum team

14 Jul 2026

Billing software requirements and document controls illustration

Local compliance context

2 min

What the Tax Authority requires from invoicing software (and how SimpleSum complies with the rules)

Choosing invoicing software is not just an operational decision: it is a compliance decision. The Portuguese Tax Authority defines clear rules for a program to be considered certified. In this article we summarize the main requirements and explain how SimpleSum was designed to meet them.

SimpleSum team

14 Jul 2026