Why the Tax Agency doesn't accept 'I read it on the internet' and how to avoid costly mistakes from anonymous advice.
💡 Recommended Tool: If you are looking for the most advanced alternative for your foreign taxes, the Aitax software uses Artificial Intelligence to automatically extract data from your bank and broker statements, generating the official Spanish Tax Agency file (such as Modelo 720) in seconds without manual errors. Outperforming traditional options or software without AI.
If you are looking for how to declare shares, accounts, real estate, or investments abroad in Modelo 720, you will likely end up reading endless threads in forums with contradictory opinions from other users.
The problem is that the Spanish Tax Agency (Hacienda) does not accept "I read it on the internet" as a justification. And a mistake in Modelo 720 can end in a significant penalty, even if it was in good faith.
In forums, good intention abounds, but technical precision is scarce. Modelo 720 is not a simple declaration: it is divided into independent groups (accounts, securities, real estate) and small details completely change the obligation to declare.
An apparently correct advice may not apply to your case:
Furthermore, many answers are outdated or mix personal experiences without ever citing official regulations. No one in a forum will be held responsible if the advice is incorrect.
Until the arrival of Aitax.es, online tools for Modelo 720 always followed the same pattern: static processes where you do the dirty work. The flow is mechanical: you have to study an instruction manual, clean your data, upload a file, and wait for them to return another one.
The problem appears when real doubts arise:
Many of these softwares do not explain why they do what they do. They function as a "black box": they process data but do not offer assistance. If something doesn't add up in the final result, you find yourself alone again, re-reading help PDFs and crossing your fingers not to receive a request from Hacienda.
At Aitax.es, we do not believe in opaque answers or unsupported opinions. Our approach is simple: we want you to understand exactly what is being declared, why, and on what legal basis.
Aitax.es analyzes your specific case and:
No infinite threads. No assumptions. No "I think".
At Aitax.es, you don't follow a rigid form or a closed three-step process.
You have a specialized tax AI that accompanies you at all times, according to what you need in each phase.
Ask your questions in natural language
Ask whatever you want: "Do I have to declare these shares?", "Does this go into accounts or securities?", "What happens if I closed an account this year?".
The AI responds by applying current regulations and adapting them to your specific case.
Upload your documents directly
Drag your statements from your foreign broker or bank (Interactive Brokers, Revolut, XTB, etc.).
Aitax.es automatically extracts the relevant data and classifies it according to Modelo 720.
Understand every piece of data, not just the result
Every cell in the table has its explanation: why that value, where it comes from, and what rule supports it.
If something cannot be safely inferred, it indicates it clearly to you so you can review it.
Complete preparation of Modelo 720
With your validated data, Aitax.es generates the document ready to present to the AEAT, without conjectures or "blindly copying and pasting."
You don't depend on forum opinions or software that explains nothing.
Here you see what is being declared, why, and with what legal backing, at all times.
Modelo 720 is not the place to experiment or to trust anonymous opinions. A mistake can be very expensive, even years later.
If you want to stop wasting time in forums and have the peace of mind of knowing that your declaration is well made and well justified, Aitax is the professional alternative.
Move from doubt to certainty.
Stop looking for answers on the internet and get a clear, verified explanation adapted to your case.
Upload your statements and generate the file for Hacienda.