Need to mark several accounts as inactive? Simply select the Include Inactive check box at the bottom of the Chart of Accounts list (after at least one account is inactive), as shown below. You can mark any list item you want to become inactive by clicking in front of the list item name. If you try to use an inactive account, QuickBooks will ask you if want to “Use it once” or “Make it active.”
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From Laura Madeira’s QuickBooks 2010 Solutions Guide