IRS will stick with legacy processing system for the upcoming tax season
Briefly

The IRS Commissioner Danny Werfel confirmed the agency will continue using its 1960s-era Individual Master File system for tax accounts until after the upcoming tax season.
Werfel stated that testing of a new processing engine has been successful, but the decision to cut over will happen after careful consideration following the next filing season.
The Individual Master File has been described as the "heart of the tax season," as it serves as the authoritative data source for individual tax information.
The IRS has been modernizing its systems for over a decade, translating legacy programming languages into Java, and ensuring high output accuracy between the old and new systems.
Read at Nextgov.com
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