Regular carbon copy paper (If that's what you're after) doesn't work for tattooing. It doesn't stick to skin and on the off chance it does it wipes away almost immediately. Your best bet would be looking online for tattoo stencil paper. Spirit brand is by far the most popular, I've used it and it works well, though genuine Spirit paper can get expensive. There are a lot of cheaper copies of Spirit paper on websites such as Ebay, whilst they're not quite as good they still work well.
No I'm looking for an apprenticeship though, and dabbled in some tattoos on pig skin. Carbon paper is generally what they use for tattoo stencils, but office type won't work. I'm not sure why, it's either not the right type of carbon or there's just not enough of it on the paper. I thought it would work but found out quickly that it just refuses to stick, even when using stencil stuff and green soap.