When the new employee has sent in the onboarding form the progress bar changes from orange (in progress) to green in the Onboarding Form area.

In progress -waiting for employee response

Completed - now you can review the new employee onboarding form and start working with other integrations.

After the onboarding form is completed other integrations forms have now some prefilled fields like personal info, bank info, union, pension, taxcard that are coming from the onboarding form. This will simplify your work while finishing filling out other integrations forms.
It is good practice to not start on some other integrations until the onboarding form has been completed.