Hi there, LewisOil!
I've read the entire thread and your post 2 years ago. If your question is still related to the negative bill that you couldn't delete because it belongs to a closed period, we can do some steps about it.
Aside from running the verify and rebuild utilities, which is appropriate for cases like this, you can ask your admin user to set a new closing date password. This way, you can use it when deleting the bill. However, please back up your company file and ask for advice from your accountant first to be sure your books are correct.
Set a new closing date password:
- From the Company menu, select Set Closing Date.
- Select Set Date/Password.
- Enter a Closing Date and Closing Date Password.
- Select OK to close the window.
If you have a different question, please provide more details. The QuickBooks Team is always available to continue helping you.
