If you are not incorporated, then you will not complete a T4 for yourself. If you are indeed incorporated, then yes you would have had to show monthly remittances for CPP and taxes withheld...filing a T4 at the end of the year will likely get you a PIER review from CRA. What you can do is show yourself as a subcontractor to the corporation, and any monies that you withdrew would show on your personal tax return as self employed income with no expenses. Your personal income tax and CPP remittance would be still calculated. The main difference is the employer's portion of CPP would not be an expense to the corporation...either way the money still comes from your own pocket.
Something else to consider, if indeed your business is incorporated, is if there are after corporate tax profits (Retained Earnings) then you could show these being paid to yourself as a dividend. You pretty much would want to have the corporate return completed, or at least reconciled enough to see if there were Retained Earnings, and you would have to produce your own T5 from the corporation. You need to produce the T5, and send a copy of it and a T5 summary to CRA before the end of February...if you are late, there are harsh penalties ($25 per day, up to 100 days).
