Product import unexpectedly changes tax category

Hi,

I have noticed an issue when updating existing products through HikaShop import.

The import itself works correctly and updates the product information as expected. However, after importing, the product's Tax category is automatically changed.

Before the import, the product has:

Tax category: Impuestos España

After the import, it changes automatically to:

Tax category: Electronic goods & services

I am not intentionally modifying the tax category during the import.

Could you please tell me:

What CSV field/column controls the product tax category during an import?
If that column is not included in the CSV, should HikaShop preserve the existing tax category?
Could HikaShop be assigning a default tax category during the import?
Is there any configuration or import behaviour that could explain why Electronic goods & services is being assigned automatically?

The product already exists in HikaShop; I am using the import mainly to update its content, not to create a new product.

I can provide the CSV headers and an example imported row if necessary.

I have attached screenshots showing the tax category before and after the import.

Thanks.