Dell Home discounts a selection of laptops and desktops as part of its Back to School Sale, with deals starting from $249.99. (Prices are as marked.) Free shipping applies to all orders. A few best bets:
Dell Inspiron Small Desktop 3000 Celeron 2.41GHz PC for $249.99 (pictured, $50 off)
Dell Inspiron 15 3000 Series Core i3 1.9GHz 15.6" Laptop for $399.99 ($100 off)
Before you send in your tax return, double-check that you haven't made one of these mistakes that can trigger IRS scrutiny.