Get your taxes done using TurboTax

There may be other things on your return besides your taxable income that are affected when you add additional income. For instance, you may be subject to alternative minimum tax or you may have credits or deductions that are sensitive to increases in your income. You will need to compare your form 1040 before the additional income is added and after to see what changes in addition to your taxable income and income tax. 

Also, you can look at the Tax Smart Worksheet and other tax worksheets like Qualified Dividends and Capital Gain Tax Worksheet to see how your tax is calculated. You'll be able to see them when you pay for your TurboTax return:

To view your form 1040 and schedule 1 to 3:

1. Choose Tax Tools from your left menu bar in TurboTax Online while working in your program
2. Choose Tools
3. Choose View Tax Summary
4. See the Preview my 1040 option in the left menu bar and click on it
5. Choose the Back option in the left menu bar when you are done