Kaplin leads the Corporate Practice Team and advises clients regarding business formation and transactions, including choice of entity, joint ventures and LLCs, mergers and acquisitions, private equity, shareholder and partner disputes, and tax planning. He structures tax-free reorganizations and like-kind property exchanges, phantom stock and deferred compensation plans for executives, and advises tax-exempt and nonprofit corporations.

In 2014, Kaplin led clients to two significant wins in the Sixth Circuit Court of Appeals: one holding that a client could deduct a large lease termination expense when it bought the property it leased; and the other holding that an LLC did not need to pay a withdrawing member.