Thank you for reaching out to the Community, @liz-brown.
I'd be glad to provide insight for you to cancel one of your client wholesale subscriptions in QuickBooks Online (QBO).
Since you don't have an option to directly cancel your client subscription. I suggest to transfer billing to client option to remove your client from your Wholesale Billing and let your client cancel it because it's possible that your client is the primary admin.
I'll also add these articles for more insight on how wholesale billing works and removing a client or company.
Let me know if you have other questions or concerns about canceling wholesale client subscriptions. I'll be around to provide further assistance to you.
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