Hello,

I worked for 2 months in WA state, but stayed a resident in California. Do I pay CA state tax on the income I earned in WA?

Thanks!

Income earned while in WA must be reported to WA.
If you were considered resident of CA, then you will report this income to CA also. On CA return claim credit for taxes paid to WA.
Read: Your U.S. Tax Return: Working or Living in Two or More states