How to add multiple textboxes into one section?

I'm trying to figure out how to add multiple textbox into one section. I would like to be able to organize the layout of the textboxes in it's own section as well.

My understanding is that you want to have multiple fields in 1 row or 1 question. If yes, then I recommend you to check the Multiple Text Fields widget. Here's a screenshot:

You may also use the Configurable List widget. Please check this user guide: How-to-Set-Up-the-Configurable-List-Widget.

Here's a guide on How-to-Add-a-Widget-to-Your-Form.

Hope that helps. Thank you.