If i accidently hit yes for American Opportunity Credit and Lifetime Learning Credit, How do i change it to no or re-answer the questions?

Yes,

if you wish to change answers in the Education Interview:

 

Go back to the Education Section under Deductions & Credits

Select "Update" next to Expenses and Scholarships (Form 1098-T)

Click "Edit" next to the student named

Click "Edit" next to Education Information (the last option on the list on the "Here's Your Education Summary" screen. 

 

This should allow you to go through the education interview another time and correct your answers if necessary. 

Be sure to click Continue until you finish the interview.  

 

Please clarify if what you really want to do is eliminate the credit.