Industry · Tax advisory firms

Fewer interruptions. More time for clients.

Call0 answers the calls to your firm, answers questions about documents and filing deadlines from your information, and passes each matter with the client number to the person handling the file.

Start without an account.

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A professional services employee handles a phone enquiry at her deskAI-generated

This is how Call0 sounds in your industry.

Paul AI firm reception

Demo Tax Advisory Weber & Partners

Demo business speaks English

Hello, Demo Tax Advisory Weber and Partners, this is Paul, the firm’s AI assistant. How can I help you?

Try it Introduce yourself as a new client.

Which number should Paul call?

By clicking “Call me now” you agree to one automated test call, our contact terms and our privacy policy.

For your workflow

  • Questions about documents and deadlines without interrupting casework
  • New clients recorded with their request and type of business
  • No tax advice—only organization and handover
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Tax advisory firms · typical call

Call0 · call in progress

  1. AnruferWhich documents do you need for my income tax return?
  2. Call0Mainly your annual wage statement, receipts for work-related expenses and your insurance statements. You can upload everything through the client portal. Would you also like the person handling your file to call you back?

Question answered · no interruption

24/7

available according to your rules

Your own number

or forward existing calls

Knowledge base

approve answers with control

Transcript

keep every conversation traceable

The situation

Less phone chaos. More clear next steps.

  1. Work that needs focus

    Every call pulls someone out of a set of accounts or a tax return—and often the question was only “Which receipts do you need?”.

  2. Deadline season

    Calls pile up before filing dates.

  3. Who is responsible?

    Calls land with the wrong person and get passed along.

Capabilities

Tax advisory firms: what Call0 handles.

You define the knowledge, required fields, responsibilities and boundaries. Call0 applies that structure during the conversation.

Questions about documents

Which records for which return and how to upload them—from the information you have approved.

Find the right contact

Client number or name—Call0 passes the call to the right person.

New clients

Private or business, legal form, request, contact details.

Callbacks with context

Every callback request with the matter and the best time to call.

No tax advice

Tax questions go to your team, never to the AI.

Arrange meetings

Meetings booked directly when a calendar is connected.

  • Phone number & forwarding
  • Calendar
  • Knowledge base
  • Webhooks & 0API

Why Call0

Why businesses choose Call0.

Why Call0

More than an AI answering machine.

Call0 does more than pick up. The assistant clarifies the request, hands over to your team when a person is needed, and answers with the same knowledge on WhatsApp, by email and in the website chat.

Live the same day
Enter your website, and Call0 builds the assistant from it. 15 test minutes in the browser, without a credit card or sales call.
Several lines from the first plan
Launch includes 3 concurrent calls, 700 minutes and 1 phone number. Nobody hears a busy tone when two customers call at once.
A person takes over when it matters
Handover to your team with a queue, hold music, opening hours and a callback list. The caller is never left hanging.
Phone, WhatsApp, email and chat in one account
One knowledge base for every channel. You maintain it once, and every assistant answers the same way.
Over 500 integrations
Appointments land in your calendar, requests in your CRM or ticketing system, without manual copying.
Set up in conversation
Agent0 sets up the assistant with you and changes it when you ask. No prompt writing, no flow builder.
Start for freeBook a demo

Platform

What Call0 does besides the phone.

One account, one knowledge base, every channel. What you teach the phone assistant, the WhatsApp, email and website chat assistants know too.

  • Phone assistant

    Answers calls around the clock, books appointments, records requests and makes outbound calls. Speaks 13 languages.

    Phone assistant →
  • Handover to your team

    When a person is needed, the phones of your team ring: queue with hold music, ringing in turn, hold and transfer, opening hours and fallback rules.

  • WhatsApp assistant

    Replies to customer messages on WhatsApp with the same knowledge as on the phone. You choose between assist, approval and autopilot.

    WhatsApp assistant →
  • Email assistant

    Reads your inbox and prepares replies. Sensitive topics always go to a person; nothing is deleted or archived.

    Email assistant →
  • Website chatbotComing soon

    Answers visitors on your website from the same knowledge and hands over requests to your team.

    Website chatbot →
  • Agent0 and integrations

    Agent0 sets up and adjusts the assistant with you in plain language. Over 500 integrations connect calendars, CRM and ticketing systems.

    Integrations →

Setup

From workflow design to the first test call.

Start small, test the most important scenarios and go live only when answers and handoffs work as intended.

  1. Step 01

    Define the call flows

    You decide which calls Call0 handles for tax advisors and accounting firms and which go straight to your team.

  2. Step 02

    Import your website, review the knowledge

    Call0 reads your website and proposes knowledge and a call flow. You add opening hours, rules and responsibilities.

  3. Step 03

    Test in the browser

    Talk through routine, unclear and urgent cases before any real calls are connected.

  4. Step 04

    Connect your number

    Use a Call0 number or forward your existing line—for example only when it is busy or outside opening hours.

FAQ

Frequently asked questions.

Your exact setup depends on telephony, workflows and the integrations you want to use.

Does Call0 give tax information?

No. Call0 only answers organizational questions from your information.

Do I have to change my phone number?

No. You can forward your existing number—permanently, only when the line is busy, or only outside opening hours. Alternatively, you get a Call0 number of your own.

Do callers notice that they are talking to an AI?

Yes, Call0 introduces itself as a digital assistant at the start of the call. The voice sounds natural and the conversation is short and clear—with no hold queue.

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Hear how Call0 can handle your workflow.

Start with a browser test, or discuss your phone number, knowledge and integrations in a personal demo.

Start for freePersonal demo