Follow the steps to fill out the CA FTB 100W online effectively.

1. Press the 'Get Form' button to access the CA FTB 100W form and open it in your preferred editor.
2. Begin with entering the taxable year on the top of the form, indicating whether it is for the calendar year 2020 or a specific fiscal year.
3. Fill in the corporation name, California corporation number, FEIN, and the Secretary of State file number. Ensure that the street address along with the city, state, and ZIP code are completed accurately.
4. Respond to Schedule Q questions, marking whether this is a final return, and if applicable, specify details about dissolution, surrender, or mergers.
5. Answer the questions regarding combined reports of unitary groups, indicating whether income is included in such reports and the number of members listed in the previous year's Schedule R.
6. Provide details as required under the State Adjustments section, including net income, amounts deducted for taxes based on income, and any adjustments for depreciation or other items.
7. Complete any applicable schedules, such as Schedule A for taxes deducted, Schedule F for computation of net income, and Schedules J through V for specific tax details.
8. Once all sections of the form are filled out, review your entries for accuracy and ensure you have attached any required schedules.
9. Save any changes you've made to the form and download a copy, or prepare to print it for submission.

Start filling out your CA FTB 100W form online now for a smooth and efficient process.