GAV for house property vacant for whole year.

As per Section 23(2) of the Income Tax Act where the property was occupied for own residence or unoccupied / vacant throughout the previous year , its Annual Value shall be NIL, provided no other benefit is derived by owner of the property. 

The benefit of NIL Annual Value is available only upto two self occupied/ unoccupied house properties. i.e either one or two house properties owned by the assessee can have a NIL Annual Value. This benefit is available only for Individual/HUF. 

No deduction of muncipal taxes in respect of such property.

Unoccupied property refers to a property which cannot be occupied by owner by reason of his employment or business or profession at a different place and he resides at such other place in a building not belonging to him.