Lynn Mucenski-Keck has over 20 years of experience in the accounting profession and serves as the lead of federal tax policy at Withum. She specializes in federal tax policy, federal clean energy credits and mergers and acquisitions.
Her interactions with Congress and various DC advocacy groups give her real-time insights into potential federal tax legislation, enabling her to help clients implement forward-looking tax planning, exit strategies and cash optimization.
Lynn provides clients and Withum team members with the latest information on new federal tax legislation and treasury guidance. She offers in-depth analysis on changing legislation, particularly regarding research and experimental expenditures and clean energy credits. Additionally, Lynn assists various clients in maximizing clean energy credits and provides strategies to optimize cash flow through the purchase or sale of clean energy credits.
Lynn is a licensed certified public accountant in New York and has a Masters in Taxation. Before joining Withum, Lynn worked for six years at a Big-4 public accounting firm, including a three-year international rotation at a U.S. Corporate tax desk in Brussels, Belgium. She also oversaw the European region for a Fortune 500 global eyecare company. Her diverse background makes her a valuable asset to the Firm and its clients.
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Lynn is a recognized voice in the profession. She presents on federal tax topics at multiple venues, including the AICPA conference, the New Jersey and Oregon CPA associations and with the Stafford group. Since 2021, Lynn has been a tax contributor for Forbes and has also published articles in The Tax Advisor and The Journal of Accountancy. Additionally, she has testified before the House of Representatives Committee on Small Business and serves as a tax advisor to the S corporation and the American Council of Engineering Companies. As a member of the AICPA, Lynn is part of the ESG and S Corporation Tax Technical Committees. She also serves as a tenured undergraduate and graduate associate tax professor at a local university and is involved in the Diocesan and St. John’s finance committees in Rochester, New York.
Outside of the office, Lynn dedicates most of her free time to her husband and three children, who are actively involved in music, Odyssey of the Mind, and sports, including volleyball, basketball and soccer. Lynn enjoys cooking new recipes and hosting family events. Additionally, she has a passion for travel, with trips taking her to destinations like Alaska, Machu Picchu and Belgium.
A recent federal court decision may reopen the door to refunds of COVID-era tax interest and penalties that many taxpayers assumed were lost for good. In Kwong v. United States, No. 23 267 (Fed. Cl. Nov. 25, 2025), the U.S. Court of Federal Claims held that the COVID-19 disaster declaration triggered a mandatory suspension of…
The path to securing wind and solar energy tax credits is now narrower and more complex under recent legislative changes. H.R. 1, P.L. 119-21, also known as the One Big Beautiful Bill Act (OBBBA or OB3), enacted July 4, 2025, amended the expiration dates for a variety of the renewable energy tax credits that were…
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