Tax Collection 2 Income Tax Deduction Car Log Book Method Depreciation Amount This is the depreciation amount, during the relevant period, of the car when the log book method is used for work related car expenses. Income Tax Deduction Project Pool Description This is the description of the deduction claimed for capital expenditure allocated to a project pool. Income Tax Deduction Superannuation Contribution Eligible Date A date supplied of the last eligible superannuation contribution.