I payed State tax of the first two months in 2019 by myself, I have the confirmationn number, but it is not shown on my 2019 W-2. So when I finished my 1040 form， it shows I still need to pay the first tow month tax which I had already payed, What I should do? how to fix this problem, Thanks a lot.
How did you pay it? If it's not on your W2 you need to get a corrected W2 from your employer. But it sounds like you sent it in yourself directly to the state? You need to enter it as an estimated payment.
To enter Federal or State Estimated Taxes Paid, including a state estimated payment made in January for the prior year, go to
Federal on left or at top. Personal (Home & Business)
Deductions and Credits at top
Then scroll way down to Estimates and Other Taxes Paid
Estimated Taxes - click the Start or Update button
You enter state estimated payments under the federal side (because they can be a federal itemized Deduction). THEN after you finish filling out the estimates under Federal you need to click on the State Tab at the top and start the state return over for it to update.
You have to pick the right state from the drop down box and enter the right payment dates.