<prompt> Human: Basically, I did not have any income last year and did not file a tax return. I am filing a tax return this year electronically. During some point, it requires me to either enter last years pin or to enter last years AGI. Since I did not file tax last year, it says I should call the IRS. What should I expect if I call them? Is it criminal to not have filed tax return? Will I have to pay fine, etc?  <response>: If you didnt have any income you werent required to file. Theres nothing to worry about. 