After you file
You can see the difference in your income from your original Form 1040 and your Amended Form 1040-X by reviewing the income in column B:
We're unable to see your tax return in this forum, but your taxable social security income depends on your total income. If you are single and made between $25,000 and $34,000 last year, up to 50% of your Social Security is taxable. If you made more than $34,000, you'll pay taxes on up to 85% of your Social Security. When you enter all of your income, TurboTax will calculate the taxable portion of your Social Security. (Half of your social security benefits are included in the base.)
Refer to the TurboTax articles Is my Social Security income taxable?, How does receiving Social Security affect my taxes? and When Does a Senior Citizen on Social Security Stop Filing Taxes?
