By over $100, what is going on?

Without seeing your federal and state returns it's hard to figure out why your state refund decreased.  Please review the following threads in Community for possible explanations.

• My state tax return went down when I added my stimulus payments. 
• After I entered stimulus payment amounts, my state refund amount dropped. 

If these do not help, please reply in this thread with some more details, especially which state return you are preparing.

It decreased my refund and i want to know why 

The state of Oregon is collecting tax on stimulus checks when residents file their state income tax returns. To figure out how much is owed, filers should multiply their stimulus payment by Oregon's state tax rate of 8.75%. For example, a single person in Oregon likely received $1,800 in stimulus payments.