The H&R Block Tax Preparation Course is the interview. The course instructors are the managers during tax season. Successful course completion is the prerequisite for employment. The course itself covers all aspects of tax preparation for individuals and businesses. It lasts roughly from mid to late September through December. It is divided into manual tax preparation and computerized tax preparation. The course is rigorous. but well organized. Upon completion, preparers have a good foundation for handling tax returns. This foundation is built upon during tax season. Of course, due to the complexity of tax law, some returns inevitably require the assistance of senior tax preparers.