Could you clarify?
So in the acf group, create your fields.
Then in your rules set “post taxonomy” to equal the taxonomy you want the fields to show for.
When creating your posts, if you checkbox the taxonomy/category you chose the fields will show.
To troubleshoot:
1. check that the fields are showing further down the page, sometimes they will show but they will only appear at the bottom of the post unless you set the priority
2. Try saving the post to see if the fields show
Post a screen shot of your rules so we can see 🙂
