Сhurchill House's Phrasal Verb of the Day is: fill in

Definition: to write all the necessary information on a form or questionnaire.

E.g.1. Could you help me fill this form in? I don't know what I should write for question 3.
E.g.2. We need you to fill in this form to check that we have the correct information about you.

This phrasal verb can be separated. (E.g. 1)
[V+ADV+N, V+PRON+ADV, V+N+ADV]