These are the ones you receive if there are errors in your 2026 return

Let’s tell you What are the notices that the Treasury will give you? If you find an error in your declaration in 2026, which is that of the Income 2025 campaign as it is the one that regularizes the last fiscal year. Since last April 8 you can now access and present the online income draft either from your mobilebut if the Tax Agency finds errors it may fine you, even if you have presented a draft generated by it.

But before fining her, the Treasury has a series of notices to give you room to make corrections in your statement. These notices are before, during and after making the declaration, and we are going to review them so that you know what they are about and how they work in the event that you receive one.

How the Treasury will report your errors

When you submit your Income Tax return, a processing process begins that will go through different states. One of them is review, and if the Tax Agency detects discrepancies between what you have declared and the data they have, your income will go to a state of Testingin which they may ask you for more additional information.

A few years ago, if errors were detected, the Treasury would simply sanction you, even if you limited yourself to presenting the draft made by them. But now you have the right to make mistakes without bad faith, so there are a series of notices to give you time to correct your declaration and avoid sanctions or inspections.

These are the notices that may appear To make corrections to your income tax return:

• Initial notices: The first notice you will receive will be in tax data. When you access them, the Tax Agency will tell you that you must report some financial income, such as those from online stores or cryptocurrencies. It’s a warning so you don’t forget to add them.
• When filing your return: When you are completing form 100, which is your Income Tax return, there is a section at the end where your data is reviewed to tell you if there is any discordance or that you have forgotten to write. Simply an algorithm that makes sure that you have filled out everything, and if there are things put in one section that contradict those in another.
• Warnings section: This is the big news about this year’s income, and it appears precisely in the previous point. When you are in Renta Web to make your online declarationhave a section of Warnings in which you will be told if you have written apparently incongruous information that could cause your declaration to be verified by the Treasury.
• Notice letters: There is a third level of interaction in which the Treasury sends you a letter after you have filed the return. This letter will tell you that they have detected discrepancies, so that you can assess whether you want to present a complementary declaration that adapts to the information from the Tax Agency. You can correct the information or say that everything is true.

In Xataka Basics | Income Guide 2025: calendar, previous steps and how to prepare for the 2026 declaration