Sage 50 US

The 1st Photo is December 2015 balance sheet, the are all correct. I change the period to Jan 2016( the 13 period), why dispay the second photo probem(red color marked), please help me.

I do not have a very robust accounting system as of yet. I have thousands of products and no time to individually enter each transaction at this point. Basically I want to track my sales and taxes so that "folks don't throw rocks at me". When I do a daily…