This is the notetag for "Attack" in skills tab, it should increase the ATB charge when i attack.
However, when I use Mog's Battle HUD, the ATB Notetags seem to lost its function, I don't know why.
Notetag created by Yanfly's ATB Plugin

This is the normal attack skill's notetag. I also tested other tags such as <ATB Speed: x> and Lunatic mode too
(if you are familiar with Yanfly's plugins).
EDIT: I misunderstood this notetag, this does increase ATB Charge for the TARGET not the USER. Is there any way to increase ATB Charge for the USER while casting a skill, I've looked in the help file but i can only see targets affected by it.
Other mistake:
Spoiler
When in battle:
The ATB Bar is the red on the right
In this battle, Harold is casting Spark with no notetags //
Therese and Marsha here should attack instantly because of the skill Notetag, but the <ATB Charge: +10000> didn't worked.