For tax advisers & accounting firms

Receipts in the portal, not in the inbox.

Request documents, collect signed powers of attorney, settle queries, offer appointments — your clients do it in one portal under your firm’s brand. Your firm works with complete records.

Sound familiar?

  • Receipts arrive as phone photos by email, spread over five messages — and the most important one is missing.
  • A deadline is coming up, and your team reminds every client individually about missing documents.
  • Queries about single receipts run over phone and email — later nobody knows what was settled.
  • Powers of attorney and engagement letters get printed, signed, scanned and sent back.
  • Reports and tax assessments go out as attachments — and a year later the client cannot find them.

This is what solved looks like.

This is what a client portal for your firm could look like — assembled from building blocks that exist in Portenia today, without a line of code. Names and figures are examples.

  • Request documents — with reminders

    Request missing receipts with a form request: the client gets a secure link, reminder emails are preset. With workflows, the portal also reminds clients ahead of a deadline on its own.

  • Documents with folders, versions and text recognition

    A fixed filing structure per client and year. Scanned receipts become searchable; new versions add to the history instead of replacing it.

  • Sign powers of attorney digitally

    Advanced electronic signature with a one-time code and audit trail — for powers of attorney, engagement letters and approvals. It is not qualified; where the law requires the qualified form, you keep your current route.

  • Queries in chat, appointments by booking

    Settle queries in the chat with the client; clients book free consultation slots themselves — synced with your Microsoft 365 or Google calendar.

  • Approvals, invoices and an AI adviser

    Clients approve drafts with a click, your invoices are in the portal. An AI adviser answers questions about the portal — it does not replace tax advice.

  • Your data stays in your systems

    Master data and processing status come into the portal from your databases inside your own network via the connect agent, or via the API. There is no ready-made DATEV integration — what can be connected, we work out together.

portal.ihre-kanzlei.de/unterlagen

Income tax 2025

Documents for your return

Please by 15 Mar

3 of 5 in

60 %

  • Payroll tax certificateUploaded
  • Service charge statementUploaded
  • December bank statementsUploaded
  • Donation receiptsUpload
  • Tradesman invoicesUpload
2025/Income tax/Receipts
Receipts land in the right folder — not in the inbox
Sign power of attorney

Power_of_attorney_2025.pdf

From your firm · due 20 Feb

One-time code••••••
Sign
Advanced signatureSeal in the PDF · audit trail

Three steps to your own portal.

  1. 1

    First conversation

    We show you Portenia and work out which documents, processes and data your firm needs in the portal.

  2. 2

    Set up the portal

    Your firm’s brand, your folder structure, your request forms — assembled without programming.

  3. 3

    Invite your clients

    Your clients upload receipts directly — and your team stops searching the inbox.

See your portal before you decide.

In 30 minutes we show you how receipts, powers of attorney and queries work in Portenia — and what that means for your firm.

Personal, at a time that suits you

Request demo