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Setup guide · November 2026
/ Guides · Vendus · Connect to the AT

Connect Vendus to the AT.

For Vendus to report series and get the ATCUD, it needs a sub-user of the Portuguese tax authority (AT) with the WSE profile. You create it on the Portal das Finanças and enter it under Gestão, Autoridade Tributária.

01What you need

The company's password for the Portal das Finanças and access to Vendus's Gestão area.

02Required profile

WSE, to report series. WDT is optional, for companies that need transport documents.

03Next

Series in Vendus.

01

Create the AT sub-user on the Portal das Finanças

The AT sub-user is the credential Vendus uses to communicate with the AT. You create it once, with the company's password.

  1. 1Sign in to the Portal das Finanças with the company's NIF and password.
  2. 2Open Todos os Serviços, Autenticação de Contribuintes tab, and choose Gestão de Utilizadores.
  3. 3Click Criar Novo Utilizador.
  4. 4The Utilizador field comes pre-filled. Make a note of that value. Fill in Nome, Senha and Confirmar Senha.
  5. 5Under Perfis Atribuíveis, type WSE in the filter and select that profile.
  6. 6If the company needs transport documents, type WDT in the filter and select that profile too.
  7. 7Click Criar Utilizador.
Video: creating the AT sub-user on the Portal das Finanças, with captions (no sound). The company's data is blurred.
WSE
«Comunicação e Gestão de Séries por webservice» (series reporting and management by web service). Required: this is the profile that allows series to be reported.
WDT
«Webservice de comunicação de documentos de transporte» (web service for reporting transport documents). Optional, for companies that need transport documents.
WFA
«Webservice de comunicação de dados de faturas» (web service for reporting invoice data). Optional, for those who want the program to report invoice data to the AT.
Novo Utilizador form on the Portal das Finanças, with the WSE profile marked. The company's data is blurred.
The optional WDT profile, for companies that need transport documents. The company's data is blurred.
Already have an AT sub-user?

You do not need to create another one. Under Gestão de Utilizadores, add the missing profiles to it. The same AT sub-user can serve more than one program.

02

Enter the AT sub-user in Vendus

Under Gestão, Autoridade Tributária.

  1. 1In Vendus, open Gestão and choose Autoridade Tributária.
  2. 2On the Configuração card, click Configurar.
  3. 3Under Dados de Acesso AT, click Editar and enter the user, in the NIF/N format, and the password.
  4. 4Under Permissões do Utilizador, click Validar. WSE must be confirmed.
  5. 5Check that the Séries de faturação card shows Estado: Ativo (status: active).
  6. 6If the company needs transport documents, click Editar on the Transporte card. You need the WDT profile.
Configuração da Autoridade Tributária in Vendus: series, documents, transport, access details and permissions. The values are blurred.
On a new account

While the connection does not exist, Vendus shows the two steps: add the user on the Portal das Finanças and activate communication.

FREQUENTLY ASKED QUESTIONS

Frequently asked questions

In what format do I enter the user in Vendus?

In the NIF/N format, for example 123456789/1.

What permissions does the AT sub-user need in Vendus?

WSE, for the series. Vendus also shows WFA and WDT, which are optional.

Is WDT required in Vendus?

No. It is optional, for companies that need transport documents.

I changed the AT sub-user's password. What do I do?

Update it under Gestão, Autoridade Tributária, Configuração, Dados de Acesso AT. Until then, communication stops.

CONTINUE

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