Get your taxes done using TurboTax

I'm happy with the update but something seems too good to be true.  My wife received a little over $4k in unemployment.  Before the TT update I owed $400 to the IRS, after the update it says I'm due a refund of well over $600.  That's over a $1,000 tax swing on $4k of income difference.  Does this make sense?