Add an expense account and call it Non Deductible Expenses and when you transfer numbers from qb to your tax return exclude these. They are still part of your P&L as you would submit to other than tax entities.

I will give youna real world example from our business. Some lenders have required we maintain life insurance to cover the loan. Life insurance proceeds are not taxable and so premiums, whikema valid business expense, are not deductible for taxable net profit.