I appreciate you posting here in the community, Deska.
Currently, QuickBooks Online (QBO) only includes the vendor's name, check amount, and transaction date when printing voucher checks.
Since the ability to print payment checks with the reference number is unavailable, I recommend sending a suggestion directly to our Product Development Team. They might include this in our product updates and help improve your experience.
Here's how:
1. Head to the Gear icon.
2. Select Feedback.
3. Share your comments or product improvement ideas.
4. Click Next to submit.
You can stay updated on the progress of your recommendations by visiting our website: QuickBooks Online Feature Requests.
On the other hand, for printing a memo in the bill payment, you can manually enter it from the bill. Use this resource as your guide: When the memo field will and will not print.
In addition, you can review these articles to have an overview of your bill payment voucher: Show all items on the Bill Payment voucher in QuickBooks Online.
Please stay in touch so I can assist you further with printing payment checks in QBO.