I live in DC, work in CA. On my W2, in box 15, it states that I have paid CA taxes. Should I also have to pay DC taxes?

You do need to file a resident tax return in the District of Columbia.  However, when you file your nonresident return for California, you will need to make sure you indicate that all of wages were earned in the District of Columbia (DC). 

Since you never worked within California, none of your wages are subject to California income taxes.  Therefore, in the California interview screens, be sure to mark the wages as zero when asked for the amount of wages that are from California sources.  This will allow you to get a refund for all of the taxes withheld in California.  

You will also need to let your employer know that your wages need to be reported as being allocated to DC on your state wages going forward.  

[Edited 4/17/2024|12:24PM PST]

@Ljwatson123