Won’t let me send payment reminder telling me my subscription may have expired even though it says active

Thank you for letting us know about the issue you are experiencing when sending payment reminders in your QuickBooks account, K9sec. 

The first thing I suggest you check is the company ID. It's included in the email notification you received. You can compare it with the company ID of your active company. (The company ID is located on the Billing & Subscription page steps to open it are found below). 

If it doesn't match, the expired company in question is a different QBO company, possibly a trial.

To check this further, follow these steps:

1. Go to the Gear icon.
2. Under the Profile section, select Switch Company.

The page that appears will list all your active and canceled companies.

If it matches or you don't have any other QBO companies created, you can check your Billing & Subscription page to confirm your subscription status. 

Here's how:

1. Click the Gear icon.
2. Select Account and Settings.
3. Tap the Billing & Subscription tab.

This page shows your subscription status. For further confirmation, you can also contact our Customer Care Team. They can open your account information in a secure environment and get to the bottom of why you received that email notification. 

1. Sign in to your QuickBooks Online company.
2. Select Help (?).
3. In QB Assistant, enter the topic you need help with. You can also enter questions.
4. Select Contact Us to connect with a live support agent.
5. Click Let's talk.
6. Select Get a callback, Chat, or Call us.

Please check our available support hours and types when contacting our support so we can address your concern on time. 

Moreover, if you want to send reminders to customers when their invoices are soon overdue, check out this article: Send invoice reminders automatically or manually in QuickBooks Online.

Feel free to reach us again if you require further assistance with sending payment reminders in QuickBooks Online. Have a great day ahead.