The phrase "filled out" is commonly used to describe completing forms or questionnaires. However, there are many other synonyms that can be used to convey the same meaning. One could say that they "completed," "filled in," "answered," "satisfied," or "submitted" the form. Alternatively, someone might "supplied," "provided," or "furnished" the necessary information. Other options include "answered thoroughly," "met all requirements," or "complied with instructions." Regardless of the phrasing used, the key is to convey that the necessary information has been provided and the form or questionnaire is now complete.