AI in accounting firms · 2026-07-14

AI, tax deadlines, ZUS and documents — how can an agent help clients?

Tax deadlines, ZUS contributions and accounting documents are among the most common topics in communication between clients and accounting firms. Clients ask when they need to submit invoices, when to pay ZUS, when they will receive tax information, where to send documents and what to do if something is missing.

Some of these questions are simple and repetitive. They do not require an individual accounting analysis, but they still take up the firm's employees' time. This is why AI for handling tax deadlines, ZUS and documents can provide practical support for an accounting firm.

A well-prepared AI agent can answer clients' organisational questions, use the knowledge of a specific firm and pass on to an employee only those matters that genuinely require verification.

Why are deadlines and documents a good area for AI?

Every month, accounting firm clients return with similar questions. These mainly concern documents, settlements and payments.

Typical client questions include:

when do I need to submit my documents,
where should I send expense invoices,
can I send a photo of a document,
when will I receive tax information,
when do I need to pay ZUS,
when does VAT need to be paid,
what should I do if I do not yet have all invoices,
will the firm remind me about payments,
what should I do if I have not received information about the tax amount.

Many of these questions can be handled automatically if the firm has a well-prepared knowledge base. The AI agent can use information about the firm's procedures, internal deadlines, document submission methods and rules for escalating matters to employees.

1. The AI agent answers questions about tax deadlines

Clients often ask about tax and contribution payment deadlines. An AI agent can provide general information about deadlines and explain the procedures followed by the firm.

It can answer questions such as:

when ZUS must be paid,
when VAT must be paid,
when PIT must be paid,
when CIT must be paid,
when the firm sends tax information,
what to do if the client has not yet received payment information.

However, it is important to distinguish between a deadline and an exact amount. The agent can provide general information about a deadline, but it should not pretend to know the client's specific tax amount if it does not have access to the accounting system.

Example response:

> ZUS contributions for entrepreneurs are generally paid by the statutory deadline applicable to the relevant type of payer. If your question concerns the exact amount due, the firm's system data must be checked.

2. The AI agent explains when the firm provides amounts due

Many clients do not ask about the statutory deadline itself, but when the firm will send them information with the amount of tax or ZUS due.

The AI agent can use the procedures of a specific firm and answer, for example:

> The firm usually sends information about taxes and ZUS between the 15th and 19th day of the month. It is worth checking your email inbox and spam folder. If the message has not arrived, you can report the matter to the firm.

Such an answer is useful because it immediately explains what the client can expect and what to do if the message is missing.

3. The AI agent helps with accounting documents

Documents are one of the most common reasons for contacting an accounting firm. Clients want to know what they need to submit, in what format and by when.

The AI agent can answer questions such as:

which documents to submit for a given month,
by when to provide documents,
whether documents can be sent by email,
whether a photo of an invoice is sufficient,
where to send expense invoices,
what to do if a document is missing,
whether paper documents must be delivered in person.

If the firm defines its own procedures, the agent can answer in line with them. It can indicate the email address for documents, the client portal, accepted file formats and the deadline for providing documents.

4. The AI agent reduces incomplete client messages

A common issue for accounting firms is incomplete messages from clients. A client writes briefly, “I have a question about an invoice” or “I do not know how much to pay,” but does not provide the company name, NIP, accounting period or the document in question.

The AI agent can help structure such requests. Rather than forwarding an incomplete message to the firm, it can ask the client for specific details:

first and last name,
company name,
NIP,
the period the matter concerns,
the subject of the request,
a brief description of the issue,
email address and phone number.

This means the firm's employee receives a more complete request and can handle the matter more quickly.

5. The AI agent distinguishes general questions from individual cases

A well-designed AI agent should know when it can answer independently and when a matter requires an employee of the firm.

The agent can independently answer questions such as:

when to submit documents,
where to send invoices,
when the firm usually sends tax information,
what data is needed to hire an employee,
whether the firm helps with KSeF,
the approximate cost of a service, if the firm has provided a price list.

Questions that should be passed to an employee include:

exactly how much VAT do I have to pay this month,
can this particular invoice be treated as an expense,
have my documents already been recorded,
has the tax return been submitted,
how should an unusual tax situation be settled,
how should a tax return correction be prepared.

This distinction is crucial. The agent should not refer the client to the firm for every matter, but it should also not pretend to know data it cannot access.

6. The AI agent can remind clients about document procedures

An accounting firm can define its own document-related rules in the knowledge base. The AI agent can then remind clients of them during a conversation.

Examples of information that can be made available to the agent include:

documents should be submitted by a specified day of the month,
documents are best submitted through the client portal,
invoices can be sent as a PDF, scan or clear photo,
paper documents can be delivered by prior arrangement,
missing documents should be sent with a description of the month they relate to.

As a result, the client does not need to contact an employee of the firm every time they need basic guidance.

Questions about ZUS arise very frequently, both among entrepreneurs and in companies that employ staff.

The AI agent can answer questions such as:

when ZUS must be paid,
what to do if a contribution was paid late,
whether the firm sends ZUS information,
what data is needed to register an employee,
what information is needed for an employment contract,
what data is needed for a contract of mandate.

The agent can also explain general rules. However, if the client asks for the exact ZUS amount due, the matter requires data from the system and should be confirmed by an employee of the firm.

8. The AI agent can provide approximate calculations

In some cases, the client does not need an official amount, only an estimate. For example, they may ask:

> I have a full-time employee with gross pay of PLN 7,000. What will the ZUS cost be approximately?

The AI agent can prepare an estimated answer if the client provides sufficient information and the firm allows such responses. However, it should clearly state that the calculation is approximate and requires confirmation by an employee of the firm.

This is an important distinction. The agent can be helpful and provide an approximate result, but it should not present it as an official settlement.

9. The AI agent supports KSeF and invoice workflow queries

KSeF and electronic invoice workflows are areas where clients will have many organisational questions. The AI agent can help provide basic information.

It can answer questions such as:

what KSeF is,
whether the firm helps clients prepare for KSeF,
how to grant the firm authorisations,
whether the way invoices are submitted will change,
whether the firm has instructions for clients,
what information the client should prepare.

In this area, the agent should use the procedures of the specific firm, as every firm may have its own way of working with documents and invoices.

10. The AI agent improves information availability for clients

Clients do not always ask questions during the firm's working hours. They often look for information in the evening, at weekends or at the last minute before a payment deadline.

An AI agent can operate around the clock. It can answer questions about documents, deadlines, contact details, pricing, KSeF or basic procedures. If a matter requires an employee, it can collect the request for handling during working hours.

For the client, this means greater convenience. For the firm, it means fewer repetitive messages and better-organised communication.

11. The AI agent should not answer everything

Automating customer service does not mean that an AI agent should take over every matter. In accounting, taxes, ZUS and HR, some topics require specialist knowledge, system data or document analysis.

The agent should pass the following matters to an employee:

exact tax or ZUS amounts,
a specific invoice,
a tax return correction,
an audit by an authority,
changing the form of taxation in an individual situation,
preparing an official letter,
the status of a specific settlement,
a decision requiring accounting or HR responsibility.

This allows the agent to support the firm without replacing the work of a specialist.

How do you prepare an AI agent to handle deadlines, ZUS and documents?

For the agent to answer clients effectively, the firm should prepare an appropriate knowledge base. It is worth describing:

document submission deadlines,
how documents should be submitted,
the email address for documents,
information about the client portal,
the timing for sending tax information,
communication rules for ZUS matters,
KSeF procedures,
data needed to hire an employee,
rules for escalating matters to an employee,
situations in which the agent can answer independently.

The more specific the knowledge base, the better the agent can answer client questions.

Benefits for an accounting firm

Implementing an AI agent to handle deadlines, ZUS and documents can bring tangible benefits to an accounting firm:

fewer repetitive questions,
faster responses for clients,
well-organised requests,
fewer incomplete messages,
better timeliness in document submission,
greater information availability,
reduced workload for employees,
more consistent communication,
better service for new clients.

The greatest value comes from an agent that uses the knowledge of a specific firm and does not refer clients to an employee unnecessarily.

Summary

AI can effectively support the handling of questions about tax deadlines, ZUS and accounting documents. An AI agent can answer organisational questions, explain procedures, indicate deadlines, provide information on how to submit documents and collect requests for employees.

However, the proper distinction between matters is crucial. The agent should answer independently when a question concerns general information or the firm's procedures. It should pass on only matters that require system data, document analysis or official confirmation to an employee.

A well-implemented AI agent helps clients obtain information faster while allowing an accounting firm to reduce repetitive communication.

EINTELLIX solutions help create AI agents tailored to the knowledge, procedures and way of working of a specific accounting firm: www.eintellix.com.