I assume you mean that you are not going to pay,
and want to know how much time you have left in the house.
I would recommend you immediately contact your lender to let them know that you are experiencing financial trouble.
Talk to the lender,
and try to setup an adjusted payment schedule.
Even if your intention is to not make a payment,
this good faith effort will help buy you time.
start packing and moving anything of value out of your house.
If an eviction takes place,
you don`t want your valuables strung across the lawn.