I just received a letter from OTC asking for a detailed explanation of the type of subtraction & OK statue authorizing subtraction with supporting documentation for the miscellaneous other subtraction claimed. It's not bonus depreciation but maybe NOL CO from a few years or CG not taxable in OK?? where can i find statutes for these? If the entry was 0 it would not change my refund!  I called tech support for no help.  It might be easier to just file an amened state return? Efiled Federal & State accepted. Program didn't ask for statement so no error message? Having trouble finding their #?