What to prepare before Hacienda calls you to file your tax return by phone

Booking a Le Llamamos appointment can save time, but only if you answer the call with everything ready. The usual mistake is not the booking itself; it is attending without your reference number, IBAN, or property details.

This practical checklist helps you prepare before Hacienda calls. If you still need to book, start with Le Llamamos appointment 2026. For related steps, review the Spain tax draft guide and the taxes pillar.

First thing: which number will Hacienda call from?

AEAT states that the call is made from 91 333 5 333 to the phone number you provided when booking.

Knowing this reduces the risk of ignoring the call by mistake.

Who must be present during the call

The return holder (or holders) must be present during the appointment call. AEAT also states the call will be recorded.

So choose a time slot where you can focus and have documents at hand.

Identification: what to have ready before the call starts

Before the appointment, prepare one of these access options:

• the mobile phone linked to Cl@ve,
• your reference number.

Do not leave this for the last minute.

The 3 basic data points without which the return may not be completed

AEAT asks, at minimum, for:

• DNI and identification details of all return holders,
• IBAN number,
• cadastral references for all relevant properties.

Without these data points, the call may not be enough to complete filing.

Extra documents to prepare depending on your income profile

Prepare supporting documents according to your case:

• employment income: payer certificate, union/professional fees, legal-defense expenses if applicable;
• rental income: contracts and proof of income/deductible expenses;
• movable capital income: bank/insurance certificates;
• module-based activity: activity parameter records;
• gains and losses: deeds, dates, amounts, expenses, and fund/subsidy certificates.

If you have regional deductions or tax benefits

Have supporting evidence for deductions and tax benefits when relevant, for example:

• landlord NIF and rent paid amounts,
• insurance receipts linked to a mortgage,
• donation certificates.

Common error: assuming everything is already in tax data

Pre-filled tax data is useful but not always complete. That is why AEAT asks taxpayers to prepare supporting documents in advance.

A short document check before the call often avoids repeating the process later.

What happens if you do not have everything ready

If you cannot provide the basic required data, AEAT indicates the return cannot be prepared during that call.

In most cases, the issue is preparation, not the service itself.

Final checklist before the appointment

1. be available at the phone number provided;
2. keep Cl@ve mobile access or reference number ready;
3. prepare DNI, IBAN, and cadastral references;
4. gather supporting documents for your income type;
5. review deductions and tax benefits;
6. cancel the appointment if you cannot attend.

Final advice

Le Llamamos works best when treated like a real filing meeting, not an improvised call. Ten minutes of preparation can be the difference between finishing the return and rescheduling everything.

FAQ

Which number does Hacienda use to call for phone filing?

AEAT indicates calls are made from 91 333 5 333.

Do you need to be present during the call?

Yes. Return holders must be present, and the call is recorded.

Which identification should be ready?

Keep the phone linked to Cl@ve ready, or have your reference number prepared.

What basic data will they ask for?

At least DNI details, IBAN, and cadastral references.

What if I do not have those data points?

AEAT warns the return cannot be prepared during the call without them.

Do I also need deduction documents?

Yes, when deductions or tax benefits apply.

Conclusion

Before Hacienda calls, prepare identification, basic data, and supporting documents. That is the simplest way to make the phone appointment productive and finish your return in one call.