You are liable for any income taxes, not your employer. Your employer generally is required to withhold income taxes from your pay, unless you are an independent contractor. The money that is withheld by the employer is sent to IRS which gives you a credit when you file the tax return. But it's your money - not the employer's. If the employer did not withhold the money, he may be liable for some penalties to the IRS, but you still have to file your 1040 tax return, report your income, and pay the taxes due with your own money.
The other issues you raise are not clearly understandable. You should see a tax attorney and present all those issues with relevant documentation and explanations.
Answered on Dec 02nd, 2010 at 3:28 PM