Adobe InDesign CS5.5 added a number of new features to make the accessible production of complex documents easier. Now the InDesign team has added an Action for use with Adobe Acrobat X. Once you install it, the Action will walk you through the most common steps for polishing up InDesign documents, including setting a document language, running Acrobat’s accessibility checker, and outputting an optimized, tagged PDF. The InDesign site has all the info, and the InDesign Action for Acrobat X can be found here.

how to caeate the actions in indesign cs5
This action wizard takes advantage of improvements for accessibility in CS5.5 and CS6, so you need at least 5.5.