Go back to the W2 that you entered. You will get there by clicking the income button at the top. Scroll down to 'Wages and Salaries' and click 'Update'. The W2s that you have entered will be there. Click 'Edit' on the one you need to fix and go through it til you get to the screen with the numbers on it. Delete the number that you put in the wrong place and then enter it in the right place. Make sure all of the numbers match the W2 that you received.
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