How do I cancel this?

It's sad to see you go, @cjsmiling.

We respect your decision to cancel the subscription with us. Rest assured, I'm here to ensure that your billing concern gets addressed and point you in the right direction of support to sort this out.

To verify the status of your account and the reason for the charge that you've received, I'd recommend getting in touch with our QuickBooks Self-Employed Support team. Thus, they have tools to pull up your account in a safe environment and check your billing details to investigate this matter further.

On the other hand, you can cancel your subscription with a few easy steps. Here's how:

1. Log in to QuickBooks Self-Employed in a web browser.
2. Go to the Gear icon.
3. Select Billing Info and then click Cancel Subscription.

For more details on a canceled subscription, you can review this article for your reference: Cancel your QuickBooks Self-Employed subscription.

Moreover, I'll be adding this future resource that may come in handy in case you want to re-subscribe to QBSE again: Re-subscribe to QuickBooks Self-Employed. 

Loop me in if you have other concerns with managing your account in QBSE. I'd be glad to assist you. Take care always!