The IRS has announced the following dates they will begin processing 2013 income tax returns:
1040 Series Individual Tax Returns: January 31, 2014 (please click here for more info)
Entity Tax Returns: January 13, 2014 (please click here for more info)
My suggestion is that you use the time until these dates to organize all your documents and get them to your tax professional so that you are ready to electronically file when the IRS processing date arrives. You will still get the fastest and best response from the IRS by electronically filing; any paper returns filed will be held until the initial batches of electronically filed returns are processed.