After you file

@Chrys1 Since you do not trust TurboTax, you may find it helpful to read some information from Social Security that tells you that other income can make your Social Security taxable.

From this Social Security site:

https://www.ssa.gov/benefits/retirement/planner/taxes.html

Income Taxes And Your Social Security Benefit

Some of you have to pay federal income taxes on your Social Security benefits. This usually happens only if you have other substantial income in addition to your benefits (such as wages, self-employment, interest, dividends and other taxable income that must be reported on your tax return).

You will pay tax on only 85 percent of your Social Security benefits, based on Internal Revenue Service (IRS) rules. If you:

• file a federal tax return as an "individual" and your combined income* is
  • between $25,000 and $34,000, you may have to pay income tax on up to 50 percent of your benefits.
  • more than $34,000, up to 85 percent of your benefits may be taxable.
• file a joint return, and you and your spouse have a combined income* that is
  • between $32,000 and $44,000, you may have to pay income tax on up to 50 percent of your benefits.
  • more than $44,000, up to 85 percent of your benefits may be taxable.
• are married and file a separate tax return, you probably will pay taxes on your benefits.

And on this IRS site you will find an interactive tool that will help you see how much of your Social Security is taxable:

https://www.irs.gov/newsroom/dont-forget-social-security-benefits-may-be-taxable