Force and Tech Prowess
Player's Handbook · Appendix B: Recommended Variant Rules
When you fail an ability check, if you added your proficiency bonus to the check and you did not have advantage or disadvantage, you can spend 1 force or tech point to reroll the die. You can only use this feature once per ability check, and you must use the new roll.
Why I Recommend This Rule
This is actually a holdover from before casting ability modifier was added to force and tech points.