Tax refund incorrect?

Hi,

 

I started working on taxes with my wife and our small business. We finished the first portion, our personal incomes and our return showed as being about $2100. When I proceeded to start the small business portion of the return, the listed tax return was instantly reduced to about $600. What gives? I completed the business section and the return went up to $2200. This doesn't make sense. Last year our circumstances were very similar and the return was about $4100 (with an accountant). Did I do something wrong in my return?? Please help.