Welcome Lilly:
A longer tailpiece is available; its back to the plumbing supplier. OR, if you still have the old one, it should fit right back in there.
Glenn
Try this link http://www.hammerzone.com/archives/bath/projects/remod_w1/vanity_s/faucet_moen84200.htm
A channel locks wrench will hold the center drain, put the handles into the drain and hold on.
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