As a single person, SS allows you a base of $25,000. You must then deduct half of your SS benefits from that base, and the result if what you are allowed to have in other income before any of your SS benefits become subject to tax. So in your case, the formula would be $25,000 minus $8,619 = $16,381. Any other income you have which exceeds $16, 381 makes part of your SS taxable.
Since your wages were $30,119, it works out that $8,527 of your SS benefits are also subject to tax.
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