Hello and thank you for contacting JustAnswer. We appreciate the opportunity to be of service to you.
If your amount on line 5 of the Form 8917 is less than $130,000 and you are MFJ then the deduction should be $4,000.
What is the sum of lines 23-33 on your 1040? That should be the amount on line 4 of the 8917.
Can you please tell me what are the amounts in the boxes of the 1099-T and what is the sum of lines 23-33? Also what is the amount on line 5 of the 8917?
Are you claiming any other education credit?
There could be a glitch in the software. Based upon what you have told me I see no reason that you should not qualify for $4,000 adjustment.
You should contact Turbo-Tax and see if they have an update or a fix available.
If I can be of any further assistance in this matter please do not hesitate to contact me.
Thank you and positive feedback is greatly appreciated.