In Quickbooks Online, how do you delete several customers? This issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Experts are available to help you repair your Quickbooks issue quickly so you can get back to running your business. If the problem is complicated or you are unable to resolve it, please contact us by How Do I Delete Multiple Customers In QuickBooks Online or via one of the other help options.