It seems that you've availed the discounted price upon subscribing to the QuickBooks Online and now it's over, which is why you're seeing the full amount.
The regular price for the QuickBooks Essentials is $30/month. The discount applies to those who opt for the Buy Now which is good only for the period (3 or 6 months) offered on our website during the subscription. Once you've fully exhausted the promo, the regular price will then apply.
Manage your subscription in your Billing and Subscription page, then go to the Settings menu in your QuickBooks Online and select Accounts and Settings. There you'll get the answer to your subscription rate questions. You may also want to downgrade your plan to the Simple Start which is $20/month.