Sampada,

As someone already mentioned, the requiremetns varies from state to state. If you want to take your CPA from Delaware, you don't even need a bachlor's degree, all u need is assocaite degree( two years of study) plus the course in Taxation, which you can take from any online college. They won't even require two years of work experience to get certified like most other states do. Since you are already doing ur mastes, take the test and get the license from delaware. After that you can go to any other state and just satisfy the state's education, then u won't have to take the test again,  works just like driver license. You won't have to go to delaware to give the test, you can take the test from anywhere within the USA.

Regarding prep class for CPA, I will recommend becker . I know it is little expensive around $2000 , but it is definetly worth it. By the way I'm doing the same and passed two parts so far. In my case, my company paid for it.You can even opt for CD version if u can't take the live course.

For more details, go to beckercpa.com , then choose the state where u want to take the test, then everything should be self explainatory ..good luck...