On the W-2 entry screen, you can select to "add another row" for local wages and taxes. If you have more than one W-2 from the same employer and all the information is the same except for the city wages and taxes, then just enter ONE W-2 for that employer and add a local wage line for each city tax wage/tax you had on the W-2's. See sample screenshot for adding another local wage line on the W-2.
On the W-2 entry screen, you can select to "add another row" for local wages and taxes. If you have more than one W-2 from the same employer and all the information is the same except for the city wages and taxes, then just enter ONE W-2 for that employer and add a local wage line for each city tax wage/tax you had on the W-2's. See sample screenshot for adding another local wage line on the W-2.
@JulieCo gave you an excellent description on how to report your W-2.
At the bottom of the W-2 entry page it will show you boxes 15 through 20. These are for state and local income and taxes.
Just below that in blue it shows + Add another row. This will allow you to continue to add additional state or local information.