vendor is also a customer - how do i enter them

Hello there, debyfrog1.

Adding duplicate names for customers or vendors is unavailable in QuickBooks Online (QBO). This ensures the accuracy of your account's information. 

However, you can either change the vendor name or slightly modify it by putting any signs and numbers. You're on the right track in using period at the end and putting 'V" after their name, since this is currently the recommended method to fix this issue.

If you wish to run a vendor report to verify the accuracy of your transactions, you can refer to this article for the detailed steps: Run reports. It also contains information on how you can set up general report preferences and how to customise them.

Please let me know if there's anything else you need help with. I'm just around to help.