I am due to pay the maid's levy tax on 30th Nov (4th instalment). With a month's advance notice, I am terminating my maid's contract by the end of Dec. 06. Do I still have to pay the full govt. levy tax of $2400?

Do I have to inform the immigration about the termination of contract? What other documents do we have to hand out to immigration in order to clear/cancel the maid's visa. (Her actual employment visa is valid until May 2007.)

We are out of HK at the mo. Please suggest!