Illinois Special Depreciation IL-4562

[RU2]

IL-4652 Special Depreciation, prepopulates automatically for Step 2 Line 3 where it says "Last year of regular depreciation: Write the total amount of all Illinois depreciation subtractions claimed on prior year IL-4562 forms, Step 3, Line 8, for this property."

** My question is how is this line actually calculated or where can I see the supporting information in Turbotax? It doesn't seem to be an automatic addition of Step 3, Line 8 on all previous forms. 

Rahul

[Anonymous]

 I don't think the numbers are stored anywhere but are computed based on federal entries. 

from IL-4562 instructions. 

You must file this form if you acquired new depreciable property
after September 10, 2001 (and before 9/27/2017), and you claimed additional first year
depreciation of 30, 40, or 50 percent of the basis of that property
on your federal return

[RU2]

Thanks for your reply. Are the entries in IL4562 computed from the information in the current year federal return? ie previous year carry forwards are irrelevant?

[Anonymous]

don't know