Don't forget that today is the last day to file your taxes. You have until Midnight in your time zone to do so. Most post offices that have a front desk will be open until midnight ... otherwise you must have your return in the mail by the time your postman arrives at your front door.
Of course you can always file electronically too. You have until 11:50 PM tonight to file your return electronically.
It is my opinion that an electronic return that is complicated and long filed today will be flagged for review. A complicated return should have filed within the last week.
Also remember ... if you are getting a refund, you have no deadline. However ... you do flag yourself for not filing.