Richard wrote:
If B2 has a date lets say 3/15/09. How can I get D2 to show exactly 3 month
ahead to 6/15/09.

Define "exactly 3 months ahead from 3/31/09". Or better: "from 11/30/09"

You could try
=DATE(YEAR(B2),3+MONTH(B2),DAY(B2))

But it may not be what you want.