Should I be paying more than my tax liability? If my tax liability was supposed to be $3,491, why would I have to pay $4,290 instead?

It depends. It could be including the late payment penalty due to not having enough paid in during the year.  Print your tax return before filing to review the information on your forms and/or you can preview your Form 1040 and Schedules 1,2,3.

You have access to all forms when you choose to print your return in TurboTax Online/Mobile.  However you are required to pay before printing, but do not have to file until you are ready.

• Can I print a copy of my return in TurboTax Online before filing?

If you are using TurboTax Desktop you can switch to Forms and review all forms and worksheets.

From the left rail menu in TurboTax Online, select Tax Tools (You may have to scroll down on the left rail menu.)

1. Select Tax Tools
2. On the drop-down select Tools
3. On the pop-up menu titled “Tools Center”, select View Tax Summary 
4. On the left sidebar, select Preview my 1040 

For TurboTax Desktop, change to 'Forms' and review the forms