We are pleased to announce that we have completed the rollout of LinTax Cloud, in-house software built by our team for the clients of the LinTax accounting office. The portal is available at panel.lintax.pl and replaces the solution we previously used for exchanging documents. The most important new feature: you now issue sales invoices directly in the portal, and we see them immediately on our side in your books.

Why we built our own tool

Over the years we tested off-the-shelf invoicing programs and client portals offered by accounting software vendors. Each of them solved part of the problem, but none combined the three things that mattered most to us: simple issuing of KSeF-compliant invoices, full client visibility into what is happening in their accounts, and direct communication with the person handling their affairs. Mandatory KSeF in 2026 was the moment we decided to write our own solution, tailored to how we actually work with clients.

Invoicing with automatic submission to KSeF

In LinTax Cloud you issue a sales invoice in a few steps: pick a customer from the list or enter their tax ID and the company details are filled in automatically, then add line items, VAT rates and the payment deadline. The invoice is sent to the National e-Invoicing System and you can see its status in the portal: accepted, being processed, or rejected with the reason given. The same mechanism handles correction invoices, advance invoices and collective corrections. You no longer need to email us invoices or remember to forward them separately, because every invoice issued in the portal is instantly visible in your records.

What else you will find in the portal

  • Purchase and sales invoices – a complete list of documents with the current KSeF status, searchable by counterparty, amount and date.
  • Tax returns – VAT-7, PIT-36, PIT-28 and ZUS DRA with filing status, amount due and payment deadline.
  • Accounting – a view of the revenue and expense ledger, lump-sum records and VAT registers based on current data from the office, not last month's snapshot.
  • ZUS – social and health contributions, payment history and settlement declarations.
  • Documents – upload scans and photos of expense invoices; built-in OCR reads counterparty details, amounts and dates, which shortens booking time.
  • Contact with the office – messages, questions and requests in one place, linked to a specific document or period, with no digging through your inbox.

Security of financial data

Accounting data is among the most sensitive information in any company, so the portal was designed with security as a priority:

  • all communication is encrypted with SSL/TLS,
  • login is protected by two-factor authentication (2FA) based on TOTP codes from a phone app,
  • each user sees only their own company's data,
  • data is processed in accordance with GDPR.

How to get started

  1. Receive your login – we create an account for your company and send the access details to the email address specified in your agreement.
  2. Log in and enable 2FA – on first login the portal guides you through setting up two-factor authentication.
  3. Issue your first invoice – complete your company and customer details, then issue an invoice that automatically goes to KSeF and to our accounting team.

Existing clients will receive their access details from their account manager at the office. New clients receive portal access when the agreement is signed.

What comes next

We develop LinTax Cloud continuously based on client feedback. If you have an idea for a feature that would make your work easier, message us through the portal. Log in at panel.lintax.pl.