The Expert platform by Accountable is designed exclusively for accountants, providing a secure and efficient way to manage fiduciary organizations and client data. Accountants can access client documents, edit and customize client entries, and validate documents to lock them for clients. The platform also enables accountants to export key documents, submit VAT declarations, and manage their clients' tax filings all in one place. This streamlined process simplifies preparing and submitting filings on behalf of clients, including VAT returns (XML file) and client listings.
Option 1 – Via Client List
1️⃣ Go to Client List
2️⃣ Select the clients you want to upgrade (or use the Free filter)
3️⃣ Click on Assign Seats
4️⃣ Confirm with Assign (or purchase extra seats if needed)
5️⃣ See assigned clients in Seat Management
📧 Admin + clients will receive a confirmation via email
Option 2 – Via Settings
1️⃣ Go to Settings > Seat Management
2️⃣ Click on Assign Seats
3️⃣ Search for the client (Free plan + access shared)
4️⃣ Optionally, add extra clients
5️⃣ Click on Assign
6️⃣ See assigned clients in Seat Management
📧 Admin + clients will receive a confirmation via email
Accountable’s Expert platform allows you to access and manage your clients’ accounts. You can either be granted access directly by your client or send them a request to connect. Here’s how to get started:
To access your client’s account, they first need to send you an invitation. This will be done via the email address you provide to them, which you'll use every time you need to access their account.
Here’s how your client can send the invitation:











⚠️ Important: One-time setup only These steps are only required the first time you set up access to your client’s account. Once you’ve completed the process and created your Expert account, you won’t need to repeat the previous steps. For security reasons, the Expert platform automatically logs you out every 24 hours.
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To allow your colleagues to access your clients' accounts, follow these steps:


In case you want to delete a client or remove access to their account, simply click on the three dots and select Remove access.

As an expert accountant, you have the ability to manage and validate your client’s expenses. Here’s how to do it step by step:
To upload expenses on your client’s behalf:
Click on Upload expenses.

Then, click on Select a file and choose one or more expenses to upload.

If you need to create an expense manually or a credit note:
Click on the three dots (options menu) to create an expense or credit note manually.

For a complete overview of your client’s expenses:
Click on the chart icon to access the dashboard.

This will give you a full overview of all expenses categorized by suppliers and categories.

On the left side of the page:
You’ll find an overview of deductible costs for the current year.
Next to it, you will see the amount related to the current quarter.

To filter expenses by different criteria:
Click on the filter icon to select from various filter options, helping you sort expenses based on your needs.



⚠️ When you enter a custom deductible percentage, it won't be automatically set up for the category. You’ll need to add the custom percentage every time you create a new expense.
After reviewing the expenses your client has entered:
⚠️ Once validated, your client will no longer be able to change the expenses.

This is how the invoice looks on your client's account after it is validated.
The lock icon appears on both the expert platform and the client’s interface.

You can link a payment in two ways:
From the bank screen: Find the transaction and link it directly to the matching expense.
From the expense itself: After adding the expense, scroll down and click on "How was this expense paid?" Then select the matching transaction with the same amount.

























At the top of the page, you can select the year you want to view.
Once a quarter is closed and submitted, it may no longer be visible by default.

To view all previous quarters, click on “Show all 20xx” in the top-right corner.
This will make all past quarters visible again.

Each tax obligation displays a due date to show when the deadline closes.

If you want to download the XML file, follow the step-by-step guide linked in the article.

You can manage social contributions directly from this page.
When the quarterly amount needs to be adjusted, you can update it here.



If the estimated amount isn’t accurate, you can adjust it at any time by clicking “Change”.


You can find the client listing for all your clients who are required to submit one in the taxes screen of the relevant year.

⚠️ For franchisee or VAT exempt clients, you will only see the client listing once they have clients in it. If there are no clients, it won’t appear.
Unlike VAT-subjected clients, even if there are no clients in the client listing, you will still see 0 clients. This is for the obligation to submit a nil client listing for those who are subjected to VAT.
You can find the intercom listing for all your clients who are required to submit one in the taxes screen of the relevant quarter.

For franchisee or VAT-exempt clients, you can find their special VAT return in the taxes screen of the relevant quarter.


Profit estimation
The number you want to see on the tax list
The year from which to start calculating taxes
Your VAT type
Tax prepayment settings









Linked to an existing revenue or expense invoice.
Categorized manually under a suitable category (e.g., VAT payment, VAT return, etc.).


Broken or lost
Sold

View the linked expense
Delete the asset if needed


⚠️ Important: The export from the “Export your data” page includes only documents linked to the calendar year, not the quarter. This means that if your client encodes a document from 2024 and links it to Q1 2025, it will not be included in the 2025 export, but rather in the 2024 export. To export documents based on their quarterly linkage, you must do so via the VAT return page.



Personal details





How do I submit a special VAT return or a declaration 629?
Selecting the wrong company type? Here’s what to do
Author - Valesca Wilms
As content marketing lead at Accountable Belgium, Valesca writes about freelancing, self-employment, and taxes based on her own experience as a freelancer.
Who is Valesca ?Thank you for your feedback!
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Read moreFast and careful answers from Alina. Top service. Thank you
Anonymous
Merci de votre réponse
Mohamed Naji
Le suivi par mail de votre service est appréciable. J’ai été étonné de devoir communiquer mon no de compte bancaire et surtout de donner un accès consultatif à celui-ci. Mais je vous l’avais déjà évoqué en vous précisant la raison. Bien cordialement François Bellière
Anonyme
la qualité des conseils donnés
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Très bien, disponibilité !
Daniel Mpoy Mukeba
C’est hyper clair et le service est impeccable, vous répondez vite. La seule chose que j’ai remarqué qui pourrait être une nouvelle fonctionnalité: avoir la possibilité d’être plus précis au niveau de la détermination de ce qu’on paye pour nos cotisations sociales quand on a choisi un plan d’apurement. Par exemple, 300€ par mois au lieu que le choix soit juste par trimestre.
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The coaching session on tax management was excellent, good material, excellent explanations and very insightful…my accountant and tax advisor are good, but never so comprehensive and accurate. Combined with the AI I never feel alone with Accountable
Sergio Barbarino
La rapidité de la réponse et l'efficacité
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