Follow the steps to fill out the FL DoR F-1120 form online.

1. Click ‘Get Form’ button to obtain the form and open it in the editor.
2. Begin by entering the corporation's name, address, city, state, and ZIP code in the respective fields. Make sure to use black ink if you are filling the form manually.
3. Indicate the applicable year by specifying the beginning and ending dates of your tax year.
4. In the section titled 'Computation of Florida Net Income Tax', first input the federal taxable income as outlined in the instructions. If necessary, attach pages 1–6 of your federal return.
5. Fill in any state income taxes deducted when computing federal taxable income. If applicable, attach the corresponding schedule.
6. List any additions to federal taxable income using Schedule I. Clearly itemize all relevant amounts.
7. Calculate the adjusted federal income by deducting any relevant subtractions from federal taxable income as specified in Schedule II.
8. Proceed to fill in the Florida portion of adjusted federal income, including any nonbusiness income allocated to Florida.
9. Complete the tax due calculation, applying the 5.5% tax rate to the Florida net income derived from the previous calculations.
10. List any applicable tax credits from Schedule V and calculate the total corporate income/franchise tax due.
11. Fill out the payment coupon for the Florida Corporate Income Tax Return, ensuring to enter the total amount due and any refunds or credits being requested.
12. Finally, review the entire form for accuracy, then save your changes, and submit the form electronically.

Complete your FL DoR F-1120 form online today to ensure timely and accurate filing of your corporate income tax.