An Associate degree in business administration is a very good start down the path to becoming a CPA. Depending on the state you wish to earn your CPA the rules and regulations vary. I would encourage you to contact your state CPA society which can be found through the AICPA website here: www.aicpa.org
Generally speaking a CPA license requires 150 semester credit hours of education including a Baccalaureate degree and a required number of semester hours in accounting. A Baccalaureate degree in accounting is recommended since you would be studying the same subject matter that the CPA exam covers.