Trying to update my plan but with the discount I was first offered. I can not find that discount code.

Hello there. I understand your concern and the urgency of fixing this matter as soon as possible. 

I'm here to help you. In your case, this needs to be checked with our QuickBooks Support Team so they can look into your account and check about the discount code. Also, considering the Community is a public forum, we can't access your account and share classified information. 

To contact support:

1. Sign in to your QuickBooks Online company.
2. Go to Help.
3. Select Contact Us.
4. Enter your concern, then select Let's Talk.
5. Choose a way to connect with us:

• Start a chat with a support expert.
• Get a callback from the next available expert.

I'll leave you this website that tackles different plans and pricing in QBO: QuickBooks Online Plans & Pricing. 

If you have other inquiries about QBO, leave a comment below. I'll be here to assist you at any time. Have a good day!