A healing tattoo normally peels. If the peeling would be from tattoo healing, you are fine.
I am wonder why you think your skin would peel later - did you truly just get a tan, or did you get a burn that turned into a "tan" and will likely peel in a few days? If that is the case, then wait. If your skin has to heal from being in the sun recently, let it finish healing before you beat the crap out of it with a new tattoo - that is your best chance to heal without problems. But you do not wait for a "tan" to "fade" to get the tattoo. I hope that makes sense.