Dear wanishree naidu
You have to go by the provisions which says the following
1)
Every person is required to file with the Wealth Tax officer a return of net wealth in Form BA, if his net wealth or net wealth of any oher person in respect of which he is assessable under the Act on the valuation date is of such an amount as to render him liable to wealth Tax.
RETURN SHOWING WEALTH TAX BELOW TAXABLE LIMIT (SEC 14(2)
A Return (other than the return furnished in responce to a notice under sec 17) which shown the net wealth below the maximum amount which is not chargable to tax shall be deemed never to have been furnished.
Going by this sec a return that will declare a tax liability is only contemplated under it. therefore if there is no liability it goes to say you need not file a return.
2)
PLEASE REFER TO SEC 7, FOR VALUATION OF ASSETS
REGARDS
KARTHI