The taxes should be pulling in from the forms you entered. You generally don't need to make additional entries. You state that you triple checked the w2 input, look at your box 14 input and state tax withheld in box 17. You could have swapped the income and the taxes boxes and once you do that, you are sure it is right. Double check the PFML. The transit tax is only 0.1% so perhaps the decimal is in the wrong place or the w2 has the decimals in the wrong place. If the w2 is wrong, you can correct a box 14 issue. If it is box 17, you will need to contact the employer for a corrected w2.
You are super smart to have caught the problem. Take a break and come back with fresh eyes.
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