Choosing the right business entity is a critical tax and legal decision for new and existing ventures. This course explores entity classification rules under the 'check-the-box' regulations, including default classifications and the use of Forms 8832 and 2553 to elect corporate or S corporation status. It covers qualified joint ventures, IRC Sec. 761(a) elections, and planning opportunities related to LLCs, partnerships, and corporations. Participants will examine key advantages, disadvantages, and tax consequences of each entity type, along with late election relief and fiscal year considerations. Practical examples and strategies help guide informed, tax-efficient business structuring decisions.