I did the free trial and then upgraded to Simple Start. It has been the opposite of simple. Can you help me with getting a refund and paying $12 monthly?

I can share some information about getting the $12.50 offer for QuickBooks Online (QBO) subscription, @jennannegarcia-g. 

The discounted offer for Simple Start ($12.50) is good for the first 3 months of your subscription. That is for new users, who’ll subscribe right away. 

You may consider starting over a new account to get 50% off for 3 months. Then, set this up or use the same ID and password you already use for your existing QBO account. 

Follow the steps below:

1. Go to this link: Plans & Pricing.
2. Make sure to toggle the option for Buy now for 50% off for 3 months and click on the Select button under Simple Start.
3. Follow the prompts to finish setting up your account.
4. When you reach the Create an Intuit account page, scroll down and click the Sign in button beside the Adding a company to an existing account?. 
5. Enter the email address you use with your existing QBO account.
6. Click on the Get started button to start using the account. 

You can refer to the following articles for more information about adding or creating a new account or company in QBO: Create or add another company file to QuickBooks Online.

On your 4th month and moving forward you'll now be billed for the regular price which is $25. For more information about subscribing, changing your subscription, or just viewing your billing history in QBO, refer to this article: Manage billing, payment, and subscription info in QuickBooks Online. 

Also, here are some video tutorials that can help you get started with QuickBooks Online: Video tutorials for QuickBooks Online.

Let me know if you have questions in managing your subscription and or anything else, by leaving a reply below. I'm always here to answer them for you. Keep safe!