My refund went down when i inputted my form 1098, why is that

[JotikaT2]

It depends.

As you enter information into your return, the amount which shows up as a tax refund or liability is an estimate. 

This number will change as you answer more questions or enter additional information.  

Once you have entered all of your information, the amount shown as your tax due/refund when you are ready to file should be the amount you need to pay or the amount you are getting back as a refund.

[NCperson]

is Box 5 less than Box 1?  if so the net is taxable to you and could cause your refund to go down.