Please note that the Sprintax fee that you pay on Step 8 Finalizing, sub-step Payment is not affiliated with the amount that you may owe to the IRS/State Tax Office.
Keep in mind that Sprintax only prepares the tax forms for you which you need to file to the relevant US tax authorities. Any potential tax refund or tax debt on your tax return has to be handled by you as you're the taxpayer.
Important: Sprintax takes no part in your Federal/State debt and that amount must be paid by you.
Info: Complete instructions on how to handle your tax liability can be found in your tax return's PDF file. To download it, please log-in to your account and click on the document-shaped icon located in the upper right corner.