Received two different W-2s forms the same employer. W-2 #1: Box 18 has two different amounts, Box 19 has another amount, and there are 2 different localities, one of which I don't recognize. W-2 #2: is completely blank except for Box 15, 19 & 20, and there are no amounts in Box 18. Box 19 has an amount (very similar to the amounts from W-2s of years past), and there is only 1 locality listed (also the same as past W-2s). My assumption is that the 2nd mostly blank W-2 is a correction of the 1st W-2 but the word 'Correction' is not noted anywhere on the form. What should I do?