As many of you will know we have been voting as a community to create a Vibe Community Tactic.
The tactic can be downloaded here if you wish.
It is saved in tactics slot 3 although you can change this by simply editing the number in the file name to 1,2 or 4.
You should place the file in this folder (android). Internal storage>Documents>Sports Interactive > Football Manager Mobile 2018 > Normal > Tactics
I assume it's something similar on iOS but I use Android so I'm not sure.