You must file a written statement with your original income tax return for the tax year in which you regroup the activities. The statement must provide the names, addresses, and EINs, if applicable, for the activities that are being regrouped. If two or more activities are being regrouped into a single activity, the statement must contain a declaration that the regrouped activities make up an appropriate economic unit for the measurement of gain or loss under the passive activity rules. In addition, the statement must contain an explanation of the material change in the facts and circumstances that made the original grouping clearly inappropriate.

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