You are seeing a negative number for "State and local taxes greater than $10,000" because, under current law, you can only deduct up to $10,000 in state and local taxes on your Federal return. The amount that exceeded $10,000 wasn't included in your potential itemized deductions. See this help article for more information.
You could return to the Federal section where you entered state and local taxes to find the total to confirm that the total exceeded $10,000 by the amount you saw in the 2-year comparison.
You can preview your return before filing to review the forms that TurboTax has prepared from your entries and to find out how your taxes were calculated. See here for details. The state and local tax limitation is shown on Schedule A even if you only qualify for the Standard Deduction.
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