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@SG900RR wrote:

 I know I need to recognize the business portion of the gain and recapture the depreciation

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Unless the Home Office was a separate structure, you don't need to recognize a business portion of the gain.  You only need to factor in depreciation.

As for the depreciation, there is a spot for depreciation on the Home Sale Worksheet.  Just fill in that with the depreciation from both Home Offices.