What is the difference between a security control assessor and an isso?

No, you do not need to be a Certified Public Accountant (CPA) to work as a tax accountant. While having a CPA license can enhance credibility and open certain career opportunities, many tax professionals operate without it. For example, some individuals pursue the Enrolled Agent (EA) designation, which is granted by the IRS and authorizes them to represent clients before the IRS, prepare tax returns, and provide tax advice. Additionally, many tax preparers and consultants gain experience through specialized training, certifications, or degrees in accounting or finance. Ultimately, the requirements depend on the specific job responsibilities and the level of expertise needed, but a CPA license is not strictly necessary to work in tax preparation or advisory roles.