Serbinski Accounting Firms

https://www.ftb.ca.gov/forms/misc/1100.pdf Section B states "you determine your California tax by multiplying your California taxable income by an effective tax rate"

I'm a Canadian resident. I worked for 8 days in California as a contractor (1099-MISC, nothing withheld). I have to file a 540NR because of that. I know that I have to include my worldwide income on that return. Can I deduct costs/expenses for my worldwide income incurred in Canada?