if when you start an expense for a vendor you see the old expenses there, then you have the setting in company setting set to one, for prefill transactions with previously entered content
set it to off, or delete/overwrite each line on the new expense
Resolution for 'company setting issue: 'Entering expenses under the same supplier' available: Yes.
The company setting issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the company setting issue yourself by looking for a resolution described in the article. If it is a complex company setting issue or you are unable to solve the issue, you may contact us by clicking here or by using other company setting support options.
For more information about resolving issues related to company setting in Quickbooks/QBO or to get support for the issue 'Entering expenses under the same supplier', click the link below: