Why is the login no longer via https://antwoord.cbs.nl?
You will find all your surveys in Mijn CBS. This is where you can log in with eHerkenning or login details from the letter or email. If you log in with eHerkenning, you can use all functionalities of Mijn CBS. If you log in with login details from the letter or email, you only see the survey for which you logged in. You can immediately start submitting data, just as on https://antwoord.cbs.nl.