All mail is sent First Class. Typical mail delivery times vary depending on the length the piece has to travel, but normally 3-5 business days is typical for most of the year. Due to heavier volume from tax forms in late January and early February, this time frame for delivery may be longer as it could take up to 10 to 14 business days. Please use our Mail Tracking feature to check on a specific piece of mail if you are concerned about its delivery. Once the forms are postmarked and mailed it can take up to a week to post the status of 'sent' in the track mail status or Forms Delivery Report. The US Post Office does the best it can to deliver each piece in a timely manner. We appreciate your patience during the busy time of the year.