You have to adjust for the following items in the pro forma income statement:

• Incremental interest expense for any new debt the acquiror has taken on to finance the acquisition
• Lost interest income from cash used to finance the acquisition
• Revenue synergies
• Cost synergies
• Additional corporate costs such as integration costs
• Incremental amortization of capitalized financing fees
• Incremental depreciation from PP&E write-up
• Incremental amortization from intangible assets write-up

Keep in mind these adjustments are made pre-tax on the income statement, and then a tax rate is applied to see the after-tax effect.