I am a new comer to Canada; I filed my taxes last year for the first time, now for my second time filing taxes, I realized I did not receive/fill out a TD1 form after working two part time jobs last summer. I actually never heard of the form until today..I have already received my T4 slips for this cycle. Is there anything that can be done? I do know I will have a balance owing, but I just hope it won't be alot..Is there a way for me to pre-calculate so I can prepare myself?