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The KSeF Revolution on Amazon: How to Prepare Your Business?
19 Jan 2026
Last updated: 19.01.2025
Have you ever wondered how one minor technical detail can affect your business's cash flow? Imagine the morning of 1 April 2026. Sales on Amazon are going great, orders are flooding in, but suddenly… the system stops generating invoices. Accounting is raising alarms, customers are writing complaints, and time is ticking.
This is a real risk for any seller with a Polish NIP (VAT number) who does not adapt to the new regulations regarding the National e-Invoicing System (KSeF). From 1 February 2026, the rules are changing. Amazon's VAT Calculation Service (VCS) is shifting to an e-invoicing model, and the key to success lies in your hands - specifically, in the proper authorisation.
Table of Contents:
Why 1 February 2026 is a date you cannot ignore
Step-by-step: How to authorise Amazon in the KSeF system?
What is worth knowing about the changes after 1 February?
Useful resources - Your KSeF library
FAQ - Frequently Asked Questions about KSeF on Amazon
This article is a 3-minute read.
Why 1 February 2026 is a date you cannot ignore?
For many sellers, the VAT Calculation Service (VCS) is a lifesaver - the system calculates taxes and issues documents automatically. However, from February 2026, VCS will no longer be able to "simply" issue a PDF invoice that meets the requirements of Polish law. It must be a structured e-invoice, sent directly to the government system.
What will happen if you do not take action?
Until 31 March 2026: The system will generate "old" PDF invoices as a transitional solution.
From 1 April 2026: If you do not grant authorisation, Amazon will completely stop issuing invoices for orders covered by the Polish mandate. The entire burden of manually issuing hundreds or thousands of documents will fall on your shoulders.
Is it worth risking operational paralysis? The answer seems obvious.
Step-by-step: How to authorise Amazon in the KSeF system?
This process might seem complicated, but in reality, it only takes a few clicks in the right places. Below you will find instructions that you can complete yourself or pass on to your accounting team.
Stage 1: Logging into the central database
Go to https://mcu.mf.gov.pl/. This is the Certificates and Authorisations Module (MCU).
Stage 2: Menu navigation
Once logged in, find the "Authorisations" (Uprawnienia) section in the main menu. Next, choose the option "Grant authorisation" (Nadaj uprawnienie).
Stage 3: Selecting the appropriate entity
In the "Authorisation type" (Rodzaj uprawnienia) section, select: "To an entity for issuing and viewing invoices" (Podmiotowi do wystawiania i przeglądania faktur).
Stage 4: Amazon's details
In the "Authorised entity details" (Dane podmiotu uprawnionego) section, fill in the details of the entity you want to authorise, entering the NIP (VAT number) and the name of the relevant Amazon company.
Stage 5: Precise scope
In the "Scope of authorisations" (Zakres uprawnień) section, select:
YES (TAK) for: "Issuing invoices" (Wystawiania faktur).
NO (NIE) for: "With the right to further delegate authorisation" (Z prawem do dalszego przekazywania uprawnienia).
Amazon only needs the ability to generate the document; it does not need to manage your further authorisations.
Stage 6: Finalisation
Click "Grant authorisations" (Nadaj uprawnienia). If the system displays a green success message - congratulations! Your business is secure.
Need professional help? Contact Go2Market
What is worth knowing about the changes after 1 February?
It is worth noting that from 1 February 2026, the government interface itself will change. The Certificates and Authorisations Module (MCU) will become part of the KSeF Taxpayer Application.
For you, this means that if you don't make it in time, the process might look slightly different visually in February, but the principle remains the same: Amazon must have a digital "key" to your KSeF gateway.
Useful resources - Your KSeF library
To make this task easier for you, we have prepared a list of links that are worth saving:
Login Portal: MCU of the Ministry of Finance
Knowledge Base: Information on the functioning of the MCU
PDF Manual: Official user manual
Video Tutorial: YouTube (from 2:02)
In case of technical problems, you can contact the helpline of the National Revenue Administration - it is available on business days from 8:00 to 18:00 at the following telephone number: 22 330 03 30 (for mobile phones and from abroad), 801 055 055 (for landline phones).
Don't wait until April. Log into the MCU today, grant authorisations to the relevant Amazon company, and enjoy uninterrupted sales.
FAQ - Frequently Asked Questions about KSeF on Amazon
Why do I need to authorise Amazon in the KSeF system?
From 1 February 2026, Amazon's VAT Calculation Service (VCS) is shifting to an e-invoicing model. Amazon must have a digital "key" to your KSeF gateway in order to issue structured e-invoices sent directly to the government system.
What will happen if I do not grant authorisation to Amazon?
Until 31 March 2026, the system will generate "old" PDF invoices as a transitional solution. From 1 April 2026, Amazon will completely stop issuing invoices for orders covered by the Polish mandate, and the entire burden of manually issuing documents will fall on the seller.
Where can I grant authorisation for Amazon?
Authorisation is granted in the Certificates and Authorisations Module (MCU) of the Ministry of Finance at https://mcu.mf.gov.pl/. After logging in, select the "Authorisations" (Uprawnienia) section, and then the "Grant authorisation" (Nadaj uprawnienie) option.
Which type of authorisation should I choose for Amazon?
In the "Authorisation type" (Rodzaj uprawnienia) section, select: "To an entity for issuing and viewing invoices" (Podmiotowi do wystawiania i przeglądania faktur). In the scope of authorisations, select YES for "Issuing invoices" (Wystawiania faktur) and NO for "With the right to further delegate authorisation" (Z prawem do dalszego przekazywania uprawnienia).
Will the authorisation process look different after 1 February 2026?
Yes, from 1 February 2026, the Certificates and Authorisations Module (MCU) will become part of the KSeF Taxpayer Application. The interface might look slightly different visually, but the principle remains the same.
Where can I get help in case of technical problems?
The helpline of the National Revenue Administration is available on business days from 8:00 to 18:00 at: 22 330 03 30 (for mobile phones and from abroad) or 801 055 055 (for landline phones).
By when should I grant the authorisation?
It is recommended to grant authorisation before 1 April 2026 to avoid any disruption in the automatic issuance of invoices by Amazon. The earlier you do it, the better – you will avoid potential changes in the interface after 1 February 2026.
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