W2 line 12a is different than your 1040 line 12a. W2 box 12a is for deductions like health ins or 401k deductions. Nothing to do with 1040 line 12a. On your W2 box 2 is for federal income tax withholding. That is what's important.
For 2019 1040 line 12a ($6,963?) is the tax on all your income. How much is your taxable income on line 11b? Then the withholding from W2 box 2 is subtracted on line 17. You either have a Refund on line 20 and 21a or a Tax Due on line 23.
Did you file a 2019 tax return? Did you pay the tax due on it? Or did the IRS change your return?
This answer has been verified for accuracy by an Intuit expert employee
