You need a lawyer. The laws about these taxes and time limits are technical.
The advice provided is in good faith but not a guaranty of accuracy under all circumstances.
Agreed - you must use an attorney. You may be able to use the same attorney (assuming you had one) who set up the corp and/or call your accountant who presumably helps you file taxes. You should also contact the service you use for payroll as they may also be helpful, if you are being asked for payroll taxes that were not paid.
Regardless, you should seek counsel asap.
This is my opinion and should not be construed as legal advise for your specific case as there are many more facts which you have not provided.