Congress's delay in passing the tax extender bill has not delayed the 2014 filing season. The IRS has just announced that e-filing will re-open in Tuesday January 20th. They will alos begin processing paper returns at that time.
BUT... even if e-file is open, that doesn't mean you can file your return that day. You have to wait for all your W-2s, 1099s and 1095-A to prepare your return and file it.