Deductions & credits

As @RayW7 mentions the MAX is $1500 per form (vehicle).  Can you clarify? Do you have several vehicles and or carryover from previous years that get you to $5500?  TurboTax does allow and calculate those situations to get the proper credit.  

In the OK state interview when entering data for the credit:

1. You can enter in the amount for the current year in the top box
2. Any carry over from previous years in the 2nd box 
3. If you have more than 1 form (vehicles) you would put the total current year in box 3
4. Carryover amount from box 2 into box 4
5. Finally the number of forms (vehicles) in box 5. 

Note:  The amount in box 3 cannot be more than 1500 times the number in box 5.