If you are on a trial subscription, it will cancel by itself after 30 days if you have not entered any credit card information. Also:

1. Click on the Tools menu at the top right, and select Your Account in the Company column.
Note: If you’d like more information […]

Resolution for 'as indicated in help issue: 'I’m trying to cancel QB online but the button to cancel (as indicated in help) is not there. Thanks.' available: Yes.

The as indicated in help issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the as indicated in help issue yourself by looking for a resolution described in the article. If it is a complex as indicated in help issue or you are unable to solve the issue, you may contact us by clicking here or by using other as indicated in help support options.

For more information about resolving issues related to as indicated in help in Quickbooks/QBO or to get support for the issue 'I’m trying to cancel QB online but the button to cancel (as indicated in help) is not there. Thanks.', click the link below: