BOSTON – Two cousins whose feud over their family’s New England supermarket chain prompted an employee walkout and a customer boycott are fighting in court again.

Arthur S. Demoulas sold his stake in the Market Basket chain in 2014 after a protest by workers upset that a board controlled by him fired his cousin Arthur T. Demoulas. The chain’s customers supported the workers and began shopping elsewhere. Arthur T. Demoulas got his job back, and the chain has rebounded.

Last week, Arthur S. Demoulas and his sister-in-law filed a lawsuit alleging they’ve been excluded from involvement in an IRS audit of the chain of 76 stores in Massachusetts, New Hampshire and Maine.

A spokeswoman for Demoulas Super Markets told The Boston Globe the company always planned to include Arthur S. Demoulas in the audit process.


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