There are two types of sherrif sales, one your tax bill will be sold to someone else and then you owe them plus interest or they will force you to sell, or two, the county will force you to sell.

Ignoring the issue wont make this go away and many counties DO offer an 'offer in compromise' if you can prove economic hardship. So you neeeeeed to talk to a tax attorney and have them do the work for you or you WILL loose your home.