After you enter your details and reach Step 7 - Amended summary, you will be able to see a brief breakdown of the taxes you had to pay versus what you actually paid based on the information provided through the previous steps for the Federal amendment.
At the end you will see 'Amended Federal Tax Refund / Tax Owed' which is the amount you underpaid/overpaid and what you have to pay/receive in the end, including the refund/amount owed you already have paid/received with the originally filed Federal tax return.
For the State summary, you will be able to see the actual state refund/amount owed you had, however, that amount might change after the tax experts compare the originally filed State tax return with the one that will be generated by Sprintax.