Most people assume that because we are well past 1/31/11 that all tax related documents are in.  However, be aware that all brokerage statements may not necessarily be in.  Some are not going out until 2/15 and others may not be corrected/ revised until later in February.  As a tax professional, I highly recommend that you make sure you have all your documents before filing your taxes.  Otherwise, you will end up having to amend your tax return.  That process can be more difficult and takes time for the IRS and state to process amended returns (which must be paper filed).