How would you delete a customized checkbox from the screen field subtab? I am the author of the check box but can't get it off the field now ( it's no longer needed due to changes) picture of form in the comment section. Thank you

you want to actually delete the field? Customization> Transaction Line fields...find and delete the field?

I want to delete one of the lines in the screen fields in the sub field so from the picture say like the quote preference

As @AK47 says you delete the field. Or making it Inactive.

From what I can tell there is no where to edit or delete the only option is to disable it. Where would I go to delete it?

Customization >> Lists, Records, Fields >> Transaction Line Fields.