Finanças · Portuguese Tax Authority
Proof of activity changes (Comprovativo de Alteração de Atividade)
Understand what a change-of-activity declaration confirms and find the right proof when activity codes, tax status or other registered details change.
What it is used for
Explain a change in tax registration to an accountant or an organisation requesting proof.
Compare the original declaration with later changes and check the details reported.
Fictional practical example
Miguel adds training services to his existing consultancy activity. He keeps the change declaration to explain the new code to his accountant, together with the start declaration.
More about this document
What it is
This document proves a declaration notifying AT of changes to an activity already registered. It can concern CAE or CIRS codes, tax status or other declaration details. It identifies the change declared rather than proving a new registration.
Collection with PedirDocumentos
With your authorisation, we retrieve this document from the authority’s portal and add it to the other documents in your request. You can track the request and view the result on the platform.
Get documentPoints to check and differences
A tax amendment is not a professional licence or proof of income. The document records a declaration at a particular time; another amendment may follow. If current VAT status is requested, check whether the separate VAT status certificate is also needed.
Frequently asked questions
Is changing an activity the same as registering a new one?
No. A change declaration updates details of a registered activity. The start declaration proves the opening; the documents serve different purposes.
Does the last declaration I saved always show my current status?
Not necessarily. There may be later declarations. Review the history and check the date and details the recipient needs to confirm.
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