Laws dot-com legal forms guide Form F-1120 is used for filing corporate income excise tax returns for corporations doing business in Florida. This form can be found on the website of the Florida Department of Revenue. To properly fill out the form, follow the steps outlined below: 1. Start by entering the corporation's name and address in the top right-hand corner. 2. If you're not filing on a calendar year basis, provide the beginning and ending dates of your fiscal year. Otherwise, provide your federal employer identification number. 3. On line 1, indicate your federal taxable income. Make sure to attach a copy of pages 1 through 5 of your federal return. 4. Enter the state income taxes deducted when calculating your federal taxable income on line 2. 5. Use schedule 1 on the third page to compute adjustments to your federal taxable income. Then, enter the result on line 3. 6. Add lines one through three and enter the sum on line 4. 7. Complete schedule 2 on the fourth page to calculate subtractions from your federal taxable income. Enter the result on line 5. 8. Subtract line 5 from line 4 and enter the difference on line 6. 9. Follow the instructions to determine your Florida portion of adjusted federal income on line 7. 10. Use schedule A on the sixth page to calculate non-business income allocated to Florida and enter the result on line 8. 11. Refer to the instructions on lines nine through twenty to calculate the balance due or refund owed by the state. 12. Finally, all taxpayers must complete the coupon at the bottom of the first page and answer any additional questions at the bottom of the second page. For more informative videos, be sure to visit laws dot-com.