Group 1 - The tax basis for purchased fixed assets includes the purchase price, related taxes, and other expenses directly attributable to making the asset ready for use [3] - The tax basis for self-constructed fixed assets is based on expenditures incurred before the completion settlement [3] - For finance-leased fixed assets, the tax basis is determined by the total payments specified in the lease contract and related costs incurred during the contract signing [3] Group 2 - Depreciation for fixed assets should start from the month following their use and stop from the month following their cessation of use [4] - The minimum depreciation period for buildings is 20 years, while for machinery and equipment, it is 10 years [4] - Certain fixed assets, such as unused assets and those leased under operating leases, cannot be depreciated for tax purposes [4] Group 3 - Expenditures for the reconstruction of fixed assets that change the structure or extend the useful life are considered long-term deferred expenses [5] - Major repair expenditures that exceed 50% of the tax basis of the fixed asset and extend its useful life by more than 2 years should be amortized over the remaining useful life of the asset [5] - Other expenditures that should be treated as long-term deferred expenses must be amortized over a minimum of 3 years [5] Group 4 - The tax basis for purchased intangible assets includes the purchase price, related taxes, and other expenses necessary to make the asset ready for use [6] - Intangible assets are amortized using the straight-line method starting from the month they are put into use [6] - The minimum amortization period for intangible assets is 10 years, unless specified otherwise by law or contract [6] Group 5 - The tax basis for purchased biological assets includes the purchase price and related taxes [7] - Depreciation for biological assets should start from the month following their use and stop from the month following their cessation of use [7] - The minimum depreciation period for timber biological assets is 10 years, while for livestock, it is 3 years [7] Group 6 - Investment assets are classified as assets formed from equity and debt investments [8] - The cost of investment assets acquired through cash payments is based on the purchase price [8] - The cost of investment assets obtained through non-cash means is based on the fair value of the asset and related taxes [8] Group 7 - The cost of inventory obtained through cash payments includes the purchase price and related taxes [9]