Well my friend is trying to help me out with Eruption, the finger tapping part,[he's gone at the moment and I don't know when he'll be back.] So for the mean time I already know how to read the general 'tab'. But how do you read finger tapping in general and the eruption piece that finger taps.
Without seeing the actual tab that you have, but knowing Eruption, the highest note of each triad, is played with the right hand. I use my middle finger so I can keep the pick ready for action. So the action would be, 1, 4, 2R (pointer finger, pinky left hand, and middle finger right hand) to get a really solid note sound, you kinda wannna push, then release the right hand tap. It's kind of a circular motion. Good luck man