When we refer to tax data, we must take into account that there are two meanings, one intimately related to invoicing and another to taxation.

Let’s see them in detail.

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Tax data in invoicing

Tax data in invoicing is all that identifying data that accredits us and allows us to invoice as a professional or company.

The mandatory tax data could be the name, surnames, trade name, NIF and the address for invoicing purposes. And others less mandatory but always recommended such as email or telephone.

This data will be the same as those reflected in your census registration (form 036/037). If you are not sure what they are, you can always check with AEAT (or on their website).

Tax data in taxation

Then on the other hand, although the data would be the same, that is, identifying data, in this case they would not have the purpose of invoicing but of identifying the taxpayer when presenting their taxes.

Tax data in this case do not only refer to companies and self-employed, but to every taxpayer natural person who has to file a tax return.

For example, for Personal Income Tax (IRPF). Specifically for this tax, the tax data may contain somewhat more information than just identifying data, as they will contain all the information in AEAT’s hands that will allow you to prepare and file your Income Tax Return.

I hope this information is very useful to you ;)