If the return CAN be efiled you really SHOULD efile it. Mailed in returns must first be delivered by the post office (and will cost you more to make sure that the return was recieved by the IRS/state) then the return must be opened (eventually) and entered into the system by an over worked under paid data input operator (input error rates have been reported to be 25% or higher) and then wait for 6 weeks or much much longer to process.
