After you file

if you expected your refund to be $1739 and all they sent was $389, that difference is $1350.

 

what was on Line 40 originally?  I suspect $1400 and the IRS removed that and somewhere with the fees due to TT, the net difference comes out to $1350. 

 

does that math work? 

 

 

YOU DO NOT HAVE TO AMEND LINE 30 - the IRS had taken care of that for you.