Hello Nathan i have a IRN
when it bites you try to stay calm and don't make to much noise as you may unwittingly reinforce the biting behaviour.
You need to learn what could be possibly triggering your birds bighting behaviour. If your bird is going through the bluffing phase typigally at 3-4 months of age it will become more nippy then to test its boundries, i.e of what is socally acceptible behaviour with you. This phase is equivilent to adolesant behaviour in indian ringnecks most birds grow out of it within a few weeks.
At this point my parrot began biting my father when she stepped up onto his hand and he thought she liked the taste of his skin. He discoraded the behaviour by camly saying no and trying to distracty her with his other hand , by gently pushing her away with his forfinger frowning and saying No calmly.
She could puck up from his body language that he was not pleased he did not make to much fuss so it did not reinforce the behaviour.
You must to teach your bird what is accepable, through repeated trianing and possitive reinforcement.There are various taqueneques for coping with and avioding biting. Some people use the following techque; if their bird bites them drop thir hand suddenly causing the bird to let go of their hand. If the bird is sitting on your hand it will feel it has an unstable perch and then let go.
However you need to be careful about this as you dont want the bird to feel that it shouldn't step on to your hand. When birds step up they trypically use their beak to test if the perch is safe but this can be mistaken for biting or become biting if thie bird is startled because you react in an overly dramatic way.
Another technque is that if a bird bites you you should push your hand gently towards the bird rather than pulling your hand away so that the bird will release your finger!Whereas, if you pull your hand away with a sHout the parrot may start to view bitting you as a fun game.
please see Michel's articles on the blog on early taming and training trechneques for help with this. Its is best to try to figure out what is triggering the birds bites in the first place and try and avod those situations. It could be caused by something that you are unwittingly doing that is causing the problem, If the bird is fightend or fustrated possibly hormonal or it could be random, or as i suspect your bird is abit wild or in the buiffing phase.
Indian ringnecks can revert to their wild instincts remarkable quickly if you dont inteact with them enough but if you handly your bird for between half an hour to an hour every day up it can remain very tame even when its wings are not clipped.
I reccomend you read the page on avianweb.com on ringnecks it was useful to me

have fun.