On my Oklahoma State tax form 511 Schedules A-I, Schedule B, Line 8 must be entered. I do not understand what info they are needing.

You must enter the bonus depreciation taken on your federal income tax return.  This would be on your Form 4562 Lines 14-15-16.

Oklahoma Bonus Depreciation Add-back
If a taxpayer elects immediate and full expensing of qualified property or qualified improvement property, any depreciation calculated and claimed pursuant to 68 OS Sec. 2358.6a shall in no event be a duplication of any depreciation or bonus depreciation allowed or permitted on the federal income tax return of the taxpayer. For income tax returns filed on or after January 1, 2023, federal taxable income shall be increased by the amount of depreciation received under the IRC for the qualified property or qualified improvement property for which the election has been made to immediately and fully expense the asset on the Oklahoma income tax return for the year in which the property was placed in service.