My W2 leaves # 20 blank for Locality name. Why won't it accept and leave blank?

[kelleyscuties]

Why won't it accept #20 being blank, when it's blank on W2's?

[MarilynG1]

If there is an amount in Box 18 or Box 19 on your W-2, you can't leave Box 20 blank.

This mean you paid tax on Local Wages, so you need to enter a Locality.

If you had a locality tax for some reason withheld, but you don't have a local tax return filing requirement, you can just put the state initials in Box 20 of the state where the locality/city for which this withholding is associated.

Click this link for more info on Box 20 on W-2.