Look at your tax return From 1040. Subtract line 33 from line 24. This is the amount you owe
Also, look on Line 38 to see if there is an Estimated tax penalty
You can view your Form 1040 plus Schedules 1, 2 and 3 at any time using the online editions. Click on Tax Tools on the left side of the online program screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.