Hi, I am trying to create a homebrew subclass for a fighter that includes superiority dice but I can't figure out how to get them to be added to the character sheet. I need help with how to set them up in the subclass creation pages.
Please help!

Try making a copy of the battle master to see how it is implemented. 

That's not a subclass available when I opt to edit an existing fighter class rather than create from scratch.

Ah, ok. I am sorry, but I do not know. It may just have to be text. 

You have to set up the dice as an action, and set the limited uses for your action as the number of dice. You also have to set up level overrides to make the dice bigger when they level up.

The easiest way to do it is to spend the $2 for the Battlemaster Subclass so you can make a copy of it to learn from the way BramblefootDruid suggested. The $2 will save you hours of figuring it out.

Can't you use the Level scale option, and add 4d8 dice?

Or does that work as something else?

Quote from Margaret22 >>

Can't you use the Level scale option, and add 4d8 dice?

Or does that work as something else?

 Level scale is to give the {{scale value}} snippet something to reflect. It doesn’t actually do anything mechanically.

Oh. Would that be a good thing to use in the snippet to show what the dice are?

Correct