Ashok,
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Regarding your question: When you downloaded Struts, you got a zip file. When you unzip this file, it creates a "lib" folder. You will find all the TLD files in this lib directory. They should then be copied to the WEB-INF directory of your project.
A better and easier way to start a Struts project is to unzip the struts-blank.war file that comes with the download and make that the starting point for your project. That has all the artifacts you need set up in the proper directories.