An acquirer has up to one year from the acquisition date (referred to as the measurement period) to finalize the accounting for a business combination. If during the measurement period, the measurements are not finalized as of the end of a reporting period, the acquirer should record the cumulative impact of measurement period adjustments made to provisional amounts in the period that the adjustment is determined.
However, the acquirer should present separately on the face of the income statement or disclose in the notes the portion of the adjustment to each income statement line items that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date.

An acquirer has up to one year from the acquisition date (referred to as the measurement period) to finalize the accounting for a business combination. An acquirer should retrospectively record measurement period adjustments made to provisional amounts as if the accounting was completed at the acquisition date. The acquirer should revise comparative information for prior periods presented in the financial statements as needed, including making any change in depreciation, amortization, or other income effects recognized in completing the initial accounting.