You can fill in the additional information in your account on the site. The screenshot below shows where to find your account. You must click on your own name in the menu. This is only possible if you are logged in.
The following menu will then open for you, then click on 'Your details'.
Personal
At the top you indicate whether your account is 'Personal' or 'Business'. In this case it concerns a private individual, thus a personal account. The new information you must enter is a date of birth and a taxpayer identification number. More information about the TIN.
Business
After selecting the 'Business' button, your account is set up as a business account. The screenshot above shows that at the bottom of the page you can enter your Tax Identification Number and your Chamber of Commerce number. Press 'Update account' to save all the corrections made.
Cadastral number