The IRIS Transition Playbook: How to Decide Whether to Build or Buy Before FIRE Is Retired

The transition from the IRS FIRE system to IRIS represents a major shift in U.S. information reporting. This playbook explains how real-time validation, API-based transmission, annual certification, stronger data-quality requirements, and uneven state adoption will affect tax, finance, IT, and operations teams. It outlines the risks and hidden costs organizations should consider when deciding whether to build an internal IRIS solution or partner with a provider, helping leaders make a practical, defensible decision before FIRE is retired.

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