Sitcom
This is the multi-camera / audience format for sitcoms. It equals about half-a-minute a page. Rather than tab to the middle of the page, set your left margin to 10.5cm. Set your other margins to: right 1.5cm, top 3cm, bottom 3cm. Each scene starts on a new page.
Download RTF example
Comedy-drama
Comedy-drama is single camera and so generally uses the film format. However for TV you are expected to number the scenes. Some TV writers underline and embolden the scene headers and use 'CUT TO' but that's up to you.
Download RTF example
Broken comedy
People generally use the sitcom format.