No, in the same way that you don't include the tax or PRSI; it's Revenue's job to tell you how much you owe / are due, based on the details you provide on the Form12.
To answer your question, income levy is payable on rental profit before any capital allowances.
But the easiest thing to do, especially as its only September is to make sure the Form 12 is filled out correctly and let Revenue come back to you with your liability