Your firm,every deadline met.
For fiduciaries, accounting firms and corporate service providers in Luxembourg: clients, engagements, statutory deadlines, AML/CFT due diligence, payroll, tax and fees in a single tool, with the whole of Odoo behind it.

The whole firm,in a single database.
Six areas covered, from client onboarding to the filing of the accounts.
Clients and engagements
- Clients, ownership and links between entities
- Engagement letters: subscription, fixed fee or time spent
- Guided onboarding, through to the due diligence profile
- Monthly update sent to the client
Deadlines and filings
- Monthly, quarterly and annual VAT, recapitulative statements, OSS
- Deadline calendar per team member
- eCDF, LBR, MyGuichet and SECUline receipts filed automatically
- Reminder for time not recorded the day before
Accounting and tax
- Closing files and checklists
- eCDF validation and LBR filing
- CIT, MBT, NWT, PIT and VAT returns
- Assessments and objections tracked within three months
Corporate and domiciliation
- Domiciliation and mail register
- General meetings, boards and minutes
- Directorships and substance
- RBE: computed beneficial owners compared with those declared
Payroll, mandates and audit
- Monthly payroll runs and variables
- Cross-border workers and CCSS returns
- Third-party mandates, four-eyes movements
- Audit engagement acceptance and independence
Management and billing
- Firm dashboard, adjustable per user
- Fee invoices prepared from the engagement
- Work in progress, cost, margin and budget alerts
- Scans filed in the right folders by QR code
Built for Odoo 20 Online, with no server-side code, in French, German and English. The same package installs on Odoo Online, Odoo.sh or Odoo SovereignOps.
The solution,screen by screen.
The screens your team uses every day.




Screenshots taken on our demonstration environments, with fictitious data.
Fewer reminders,more time to advise.
The firm’s repetitive tasks go through Odoo: document requests, filings, reminders and client follow-up.
Document campaigns
One request per client, written in their language and sent in one go: quarterly VAT, personal tax questionnaire, closing, AML/CFT obligations.
Client area
Clients follow their deadlines and the documents still expected in their portal, and upload their files there with Documents.
AML/CFT due diligence
Due diligence profiles, sanctions screening, explained rating and periodic reviews, through the Risk, compliance and KYC engine.
Link with client databases
Every night, the client’s Odoo sends its production indicators: invoices to process, bank lines, VAT. No document and no journal entry.

Designed for fiduciaries,from single firms to groups.
Fiduciaries, accounting firms, corporate service providers and audit firms in Luxembourg that handle their clients’ accounting, tax, corporate and payroll work.
Accounting, timesheets, projects, signature, Documents and website in the same database: no interface between production, billing and compliance.
Your questions,our answers.
Can’t find your answer? A Cellenza expert replies within 24 business hours.
Ask a questionWhich firms is it designed for?
Fiduciaries, accounting firms, corporate service providers and audit firms established in Luxembourg, with their local obligations: eCDF, LBR, RBE, CCSS, domiciliation and AML/CFT.
Which service lines are covered?
Accounting, tax, corporate and domiciliation, payroll, third-party mandates, audit, fee billing and firm management. Each module installs on its own, on top of a common core.
How is AML/CFT due diligence handled?
By Cellenza’s Risk, compliance and KYC engine, included: due diligence profiles, beneficial owners, sanctions and PEP screening, explained risk rating, four-eyes approval, periodic reviews and a sealed log.
Do your clients get online access?
Yes. The client area shows the deadlines of their engagements, their stage and the documents still expected. With Documents, each requested document becomes an upload link.
Does it run on Odoo Online?
Yes, with no server-side code. The same package installs on Odoo Online, Odoo.sh or Odoo SovereignOps, in French, German and English.
One solutionper business.
Your firm,in Odoo.
30 minutes with a Cellenza expert to follow a client, from onboarding to the filing of its accounts.