Geoffrey Collins represents clients in all phases of tax controversy, both in court and before the Internal Revenue Service.

His experience includes major trials and Appellate cases as well as large corporate tax matters before IRS Exam and IRS Appeals. In addition, his experience includes the successful use of alternative-dispute-resolution initiatives such as the Pre-Filing Agreement program. He has represented clients in controversies involving advance pricing agreements, transfer pricing, timing of pension contribution deductions, section 199 domestic production activity deductions, carrybacks of Net Operating Losses and other tax attributes, debt-equity characterization of intercompany advances, deductibility of settlement payments under the False Claims Act, summons enforcement, and the application of economic substance, sham-transaction, and similar substance-over-form doctrines.