That depends on how you answer the questions during the interview. If you waited until you got your first refund, and you answered the appropriate questions in the program, then the amount showing now is the amount of additional refund. You can also verify this by following the calculations on form 1040 X. Remember that to file an amended return you must print and mail to the IRS, a new tax return with the changed information plus the 1040 X which is a cover page summarizing the changes. The math on the 1040 X is not too complicated and you should be able to follow your original claim, your original refund, and the calculation for the new refund.
