I have a small one person s-corp in USA. It's now almost first day of summer; however, I still haven't filed my corp taxes due to some personal issues. What do I do at this point? Should I just fill my taxes using TurboTax? What is the late fee?
You should file ASAP. Penalties are pretty expensive: $195 per month per shareholder. If you haven't paid, you'll also pay 0.5% per each month you're late, so if your tax is $1000, you'll be paying $200 per month until you file and pay (that's in addition to the regular interest on the late payment).
There are additional penalties for late filing of K-1, which may also be applicable. Also, if you're late on your payroll forms (and payments), you may be subject to much more severe "trust fund recovery" penalties.