Follow the steps to complete the IL IL-4562 form successfully.

1. Click the ‘Get Form’ button to obtain the form and open it in the editor.
2. Provide the required information: Enter your name as it appears on your tax return. Additionally, include your Social Security number or federal employer identification number.
3. Review the form instructions carefully before completing Form IL-4562. Remember not to use negative figures.
4. Figure your Illinois special depreciation addition. First, enter the total amount claimed as a special depreciation allowance from your current federal Form 4562 on the specified lines.
5. For individuals, enter the total amount claimed as special depreciation allowance from federal Form 2106.
6. Input the last year of regular depreciation by entering the total Illinois depreciation subtractions claimed on prior year IL-4562 forms.
7. Add the values from Lines 1 through 3. The total will be your Illinois special depreciation addition; ensure you enter this total appropriately.
8. Proceed to figure your Illinois special depreciation subtraction. Enter the specified portions of depreciation allowances claimed on federal Form 4562 for relevant tax years.
9. Multiply the total from Line 5c by 42.9% and follow through with the subsequent calculations for bonus depreciation as outlined in the steps.
10. Add the totals from the various calculations to arrive at your Illinois depreciation subtraction for the current year.
11. Once you have completed the form, save any changes made, and consider downloading, printing, or sharing the completed form as necessary.

Complete your documents online efficiently and ensure you're well-prepared for your tax filing.