How do I reset the bill payment reference number which automatically increases sequentially? or how do I stop it being automatically added? I want to add it individually?

Can you send the screenshot for the same.

Thanks for visiting the Community today, @O1L. I've got your back, and I'll share some details about your concern so you can manage your bill payment reference number and have them in the sequence you want in your QuickBooks Online (QBO) account.

As I check here on my end, the feature you're trying to access here in QBO is currently unavailable. There's no option to turn off the automatic populating of reference numbers when using bill payment. To get through this, you can input your reference number in your next bill payment, and then after that, your following bill payment will follow your custom reference number sequence.

Also, please be aware that this won't affect your existing bill payment transactions in your QuickBooks Online account. That said, they'll only affect your future bill payment transactions.

In addition, here's an article to help you manage you bills in QBO: Enter bills and record bill payments in QuickBooks Online.

You can also check this page about paying bills using Online bill pay: Learn about QuickBooks Bill Pay for QuickBooks Online.

@O1L, If you need further assistance with this. Know that you can always get back to me anytime by clicking the REPLY button below and mentioning my name (KurtKyle_M). This way, I'll be notified and be able to help you out again. Take care, and have a great day!

I am facing the same issue. Kindly please tell me the solution

Hello, 18001122121. 

Have you tried the solution given above by my colleagues? If so, I suggest reaching out to our Customer support team. A specialist will be able to look up your account securely and conduct further investigation via a secured remote access session.
 

To reach them:   

1. Click the Help icon located in the upper right-hand corner.
2. In the Help window, click the Contact Us button located at the bottom.
3. Enter your question and click Let's talk.
4. Select Start messaging or Get a callback.

As always, you can visit our QuickBooks Community help website if you need tips and related articles in the future.

Please know that you can always get back to this post if you have any other questions. I'll keep an eye on your response. Have a good one.