Early in 2019 I moved from California to Washington, D.C. Which mailing address should I use on my 2018 form?

[Ashby · Accepted solution]

Use your DC mailing address. You need to have that address as current for any potential correspondence. However, make sure you answer all the questions correctly that you were not a DC resident for any period during 2018. This way, the program won't think you will need two state returns.