This may include a residence or address, date of birth, PESEL (Polish citizen identification) number, age, sex, NIP (Tax Identification Number), phone number, education, profession, and the data contained within the online Tests;<br /> c) Data required to proceed with the complaint process — name and surname, as well as a User's or Respondent's e-mail address, the device's IP address, and NIP (Tax Identification Number) — which we require from entrepreneurs and from those requesting an invoice who have a NIP number;<br /> d) Information resulting from the general principles of Internet connections, such as an IP address (as well as other information contained within the system logs), which is used by the Website administrator for technical purposes.