I am trying to get the Critical Strike Damage Tempering Ability on my Barb, I created a rogue and found the Temper Recipe to get it and taught it on my rogue

I am not seeing the ability to use the Critical Strike Damage Temper on my Barb Currently,

Do I have to find it on my Rogue and before learning, transfer it to my barb and teach it on him or how does this work.

Need some help with this if anyone can help Thanks!!!!!

Yes, gotta transfer item to rogue then do the thing.

so if I already taught it on my rogue, I essentially have to delete and remake my rogue now? to get it again?

No, I believe you just put item in your shared stash, use your Rogue to temper crit dmg, then put it back in stash for your other char.