All hours must be taken towards project + work type or project task.
You can set the default settings for this under General project settings in the project module or under the Properties tab of each project card.
Work type determines whether hours are billable. Go to the Administration module - Settings - Time registration and Work type to register work types.
Billing of registered hours and costs is done via the Billing tab in the project module.
The main hour record menu consists of a menu to the left of the image and to the right of the page, the view you select appears under the Select view in the main menu.