If an employer terminates an H-1B employee before the end of that employee’s period of authorized stay, the employer is responsible for “reasonable costs” of return transportation of the employee to his or her last country of residence.  Further, regulations require notification to USCIS “immediately.”  This notification is required whether the termination was voluntary or involuntary.
Whenever there is a material change in an H-1B employee’s job, such as termination or a significant change in duties, you should contact Berardi Immigration Law so we may assist you in fully complying with any regulations that may apply.