The Dutch tax authorities receive tax relevant information from Dutch employers, Dutch financial institutions, local authorities etc. In certain cases, thet also even receive some basic information from non-Dutch tax officials and non-Dutch financial institutions. 

The information is linked to your profile and can be downloaded into your income tax return records.

Your tax consultant can apply to get access to your "Vooraf Ingevulde Aangifte" - your prefilled data - for a certain year. Shortly after the request is filed, you will receive a letter with a 9 digid code (###-###-###) on page 3. 

This code can be entered in our software and after entering, we will get access to the prefilled information from Dutch tax authorities systems. 

So, if you share the code, we can download such data from the Dutch tax authorities into our software. 

If you do not want us to get access, you can chose to not share the code.