If you are just looking at a W2 that doesn't have to match the status you actually file on your tax return. I'm married but claim Single at work. You can't worry about how she files. Just file your return right. If the IRS has questions they will mail you a letter.
Did you file separate for 2018? If you filed Joint you have the Joint AGI you will need to file 2019. What do you need her AGI and deductions for? Are you filing in a community property state?
