Mortal Kombat 11

In this video guide I will show you how to perform two different fatalities with Jax. For the first 10 characters I just used the klassic towers to get the achievement progress for I Want It All. Make sure to put it on very easy to make things quicker. Also pick the shortest tower.
Achievement progress also counts if AI do a fatality.

Comin In Hot (Close) - Forward, Down, Forward, A
Still Got It (Close) - Back, Forward, Back, Down, X

At the main menu press change rounds to win from 2 to 1.
Then go to Fight and select Local. Press to switch the opponent type from a second player to the CPU (or use a second controller for a guaranteed win).
Select Jax and an opponent, loadouts don't matter.
Then once you get to the end of the Match when "FINISH HIM" comes onto the screen input one of these combination at the specified distance:
-Comin in Hot (Close/right next to the opponent)
- Still Got It (Close/right next to the opponent)

*Directional inputs are assuming you are on the left side of the screen*

In the options (press Select) set number of rounds to 1 and when selecting opponent set AI difficulty to 'Very Easy' (can also use a second controller if available).

Hit the enemy until their health bar is drained at which point 'FINISH HIM' will appear on screen. Position your character in the appropriate spot and input the following commands:

Comin in Hot (Close) - Forward, Down, Forward, A
Still Got it (Close) - Back, Forward, Back, Down, X

Then when the points are tallied hit 'Retry' to restart and perform the second finishing move.