How do i redirect a bullet based on angle

I am making a bullet hell, I’m trying to make something that when the player shoots and the bullet is slightly off target from an enemy the bullet will set its angle of motion to an enemy within a certain parameter like less then 10 pixels away, but how would i go about doing this?

Your request is unclear. You'll need to define or describe the expected behavior more precisely. If you can do that you're already most of the way to the solution.