Printing Historical Trial Balance Report

Hi,

During the activity of Year-End closing there is an optional task of HITB report , I was confused about that running HITB reports first time requires the resetting of the Inventory module, is this resetting required every time we run the HITB report ?

Secondly if i have done the inventory reset every time i ran HITB, what effects does it causes ?  

Thanks

Mahwish