Hi there, @clfp.
Please allow me to join the thread and help you today so you'll be able to remove/delete the ancient bills created to a dummy vendor.
To remove your old/ancient bills, you must delete them one by one manually. On the other hand, if you're using QuickBooks Desktop Enterprise, you have the option to delete/void transactions by batch.
To learn more, you may check this article: Delete transactions by batch using Batch Delete/Void Transactions.
If the issue persists, I recommend reaching out with our Support Team to check and investigate this further securely. For the support's contact information, you may check it here: Contact the QuickBooks Desktop Customer Support Team.
You can always add a post/comment below if you have any other QuickBooks concerns, I'll be right here to help you. Have a good day ahead!
