WHY CAN'T I PICK WASHINGTON AS THE STATE FOR BLOCK 15? WASHINGTON IS MISSING OUT OF THE OPTIONS

[xmasbaby0]

On your W-2?  Washington does not have a state income tax.   So no tax would have been withheld for WA.

[SteamTrain]

If the software complains somehow, and you only worked in WA...leave boxes 15, 16, 17  (and 18, 19 20)  entirely blank.

IF you don't have your actual W-2....don't wing-it.  Wait for those forms to be issued and you must have them in front of you to get all the entries right.

[Hal_Al]

My TurboTax (TT) software (download Deluxe) allows me to show WA (and TX and FL).  Make sure your software is updated.

There are (rare) times when you need to enter that and TT does accommodate it. 

[SteamTrain]

Unfortunately, my "Online" Premier account doesn't allow WA in either W-2 or 1099-R

(for a different state Online Premier, includes TN for a 1099-R, but not for a W-2....TN has just the Hall tax, but some of that is income triggered...good thing the Hall tax disappears for 2021 & beyond)  .

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Yes, having those non-income-taxing states in the software can really help, especially for those working cross state borders, or occasionally for those who move to or from that particular state during the year.  e.g.  Worked in WA for 5 Months, then moved & worked in AZ.  I want to make it perfectly clear in my part-year AZ return that the WA-job W-2 was not AZ part-year income.