Income Statement Customization: Exclude Amortization Account

hi team has anyone created a custom non-GAAP income statement. Are you able to share how it was completed. Currently I am trying to create a custom statement however expenses/cost of goods are deducted from the COGS once I try to add an expense as a financial row. For example I want to removed an amortization expense charged into the total COGS, this reduces the balance of the COGS, what we wish to present is still the total of COGS and I will add that same amortization expense in another financial row to calculate a non GAAP gross profit