The phrase 'fill out section' is correct and can be used in written English.
You can use it when you want to direct someone to fill out a specific section and provide information, usually on a form or in a document. For example: "Please fill out section 8 of the application form with your contact information."
Use a black or dark blue pen to fill out section 1.
If you are mailing in an application, either include a certified cheque or money order with the application, or fill out section D, Credit Card Information.
These are boxes A and B. If you do not have an official residential address, fill out section C with a diagram indicating where you live.
If you are required to fill out section 3, and you do not have a certificate of citizenship issued in 2007 or later, print and fill out this form as well.
If you are mailing your application as described below, you should either fill out section D of the renewal form to pay by credit card, or include a certified cheque or money order.
Fill out section 1 of the form in dark ink and capital letters.
Though community orchestras may employ professional "ringers" who fill out sections and are paid, their organizational structures tend to be less like full-time orchestras' than are the regional orchestras'.
The guarantor fills out section 2 of the general application form.
Then she would fill out the section that deals with setting, comfort, and service — and that determines the number of couverts the restaurant will earn.
Of course it also helps that due to the importance of these disciplines over the course of French history, we have plenty of books to fill out each section.
As you can see from the screenshot below, you'll need to provide fairly detailed personal information for your parents if you fill out this section.
