How to fill out Form ?

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To use this model, the following conditions must be met:

Be a natural person resident in Spain.
Not being included in special surcharge regimes (VAT), such as the equivalence surcharge.
Do not exceed the income limits that require the use of Form 036 .
Not having the status of a large company.
Not to participate in international agreements.
Form 037 can be submitted in three different situations:

Registration in the census of entrepreneurs, professionals and withholding agents when starting an economic activity.
Dropping in the census when the economic activity is stopped.
Modification of tax data already registered, such as changes in tax domicile or economic activity.
When to submit Form 037?
Form 037 is submitted in specific situations, such as the registration or deregistration of economic activities, but it is also necessary when data that affects tax management is modified, such as the tax domicile, changes in economic activity or modifications in the administrative management of the business.

Form 037 must be submitted at different times depending on the situation. If it is a registration in the census, it must be submitted before starting the economic activity.

In the event of deregistration, this must be submitted within list of brazil cell phone number one month of the cessation of economic activity. For data modifications, the deadline varies, but it is advisable to do so as soon as the changes occur.


Correctly filling out Form 037 is crucial to avoid tax problems. This simplified form for self-employed workers must be completed accurately, as it details obligations such as VAT and personal income tax with the Tax Agency.

To complete Form 037, the following information is required:

Personal data (DNI, NIE, tax address).
Economic activity to be developed.
Applicable tax regime (whether it is under special regimes or not).
Information on income tax or VAT, as applicable.
When filling out Form 037, it is common to make mistakes such as entering the economic activity code incorrectly or not marking the tax regime correctly. To avoid these errors, it is important to carefully review each section before filing. It is also advisable to ensure that the personal data exactly matches the records at the Tax Agency.

Filing Form 037 — find out how to do it
Form 037 can be submitted in two ways: