Can you have Botox injected into your fingers?

No, Botox has only been approved for removing wrinkles between the eyebrows, among a few other medical uses.

Did you know that Botox is the poison from the botulism bacteria?

I don't see why not... but it will not remove your fingerprints because these are caused by skin construction not muscle spasms. Only thing it can cause is loss of feeling and potentially some movement disorders. To get rid of fingerprints you will have to remove them by damaging dermis.