Creating a New User in the User Management Page on the Tax Authority (AT) Portal

How to create a New User in the Tax Authority Portal

Who is FIZ Invoicing for?

FIZ Invoicing is a free unlimited online service with Tax Authority certificate, intended for companies, freelancers and sole proprietors.

Is FIZ Invoicing unlimited and free?

Can I associate multiple accounts with the same login?

Can I use FIZ on my phone?

Can I issue invoices without an accountant?

Portuguese Tax Portal: How to log In and register your activity?

How to register as a self-employed worker with the Portuguese Tax Authority (Autoridade Tributária e Aduaneira, AT)?

VAT Regimes for Self-Employed Workers (TI) and Sole Proprietors (ENI)

Some payments can fail for temporary reasons (bank, authentication, MB WAY) or because of incomplete setup (e.g., no phone number linked to MB WAY). This article explains the most common…

Payments in FIZ: how to fix common issues

In General Questions, you will find answers to common questions about FIZ.

General Questions

Find answers and get help from Intercom Support and Community Experts

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