In December of 2009, Congress passed an extension of the Bush tax cuts. A number of the provisions impacted your 2010 tax return. It was mainly on Schedule A, itemized deductions, and education credits. Since the Act passed Congress so late in the year, the IRS needed time to integrate the changes into the tax processing system. They are now finished with that integration.
At last, most individual tax returns can be e-Filed with the IRS. This means that you can file your return and finally get your refund in a couple of weeks.