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Entering Depreciation
To track the depreciation of an asset that you already purchased and added to the Chart of Accounts, you need two new accounts: a Fixed Asset type of (Balance Sheet) account called something like Accumulated Depreciation an Expense type (Profit and Loss) account called something like Depreciation Expense.
After you set up these two accounts, you can record the asset depreciation with a journal entry, such as the following one that records £1000 of depreciation expense: