Get your taxes done using TurboTax

@Lgeorge916 - Line 3 sums line1 and line 2. 

 

Line 1 is AMT tax

Line 2 is repayment of premium tax credit -

 

suggest going back to everything you entered.  Does the income and tax you owe appear reasonable (other than the $10,000).  

 

Is your income high enough that AMT kicks in? how do you know there is no AMT?

 

you must have answered a question or entered something inadvertantly.