In order to use the workflow tool you need to have an EU login account allowing two factor authentication. That means that you must register your mobile phone number in your EU-login account or install EU-login application on your smartphone, see instructions here: https://ec.europa.eu/eurostat/documents/203647/771732/EU_Login_Tutorial/
All EU login accounts have to be validated by us. After adding your mobile phone to your EU login account, please try to log in to our system ("EU Login" button). If your account is blocked, please write to firstname.lastname@example.org in order to have your account validated.
Read the Microdata Access Workflow Tool User Guide before you start!