I have to file through the mail this year because because my step daughter lives with us and his ex had a IP PIN number for her in the past. We have called, we have tried online. I dont think I will have time to get an appointment with a tax center in time to get a pin number now. What all do I have to mail in with my tax return? I dont want their to be issues when I send the papers in and I've never had to mail them before. Please and thank you.