After typing the text, under path use change object to path. Then under path use path effect editor. When the editor box opens select envelope deformation to manipulate text.
This help came from Russell E. Claridy.
I want to create text in a box that is curved. Anyone know a YouTube I can watch or how to get this done. If you look at the Harley Davidson logo I would like to do the text in the top and bottom Motor or Cycles. Not having much luck. I use inkscape