There is no reason you cant do it and just wait to file it nearer the deadline, if i were concerned i would do it that way and either file immeadiately or delay depending on the direction of cash flow. Yes i am going to revise my W-4 a bit, i am not content with the loan to the government, the extra a month might come in handy, who knows?pennypue:LOL, and I'm still thinking about STARTING on my taxes!!!! I am lazy and use turbotax, but then my taxes are fairly simple, but I do itemize. I tend to proscrastinate because I might owe!!! I like to keep my withholding as low as possible. No free loans to the government.