In Account and Settings / Advanced / Time tracking

you can switch off “Show billing rate to users entering time ”

It says:

” If you bill customers a different hourly rate than you pay your employees and subcontractors, you may want to leave this blank. ”

There are other settings which may help.

Resolution for 'bill customers issue: 'Problem with vendors seeing billing rates.' available: Yes.

The bill customers 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 bill customers issue yourself by looking for a resolution described in the article. If it is a complex bill customers issue or you are unable to solve the issue, you may contact us by clicking here or by using other bill customers support options.

For more information about resolving issues related to bill customers in Quickbooks/QBO or to get support for the issue 'Problem with vendors seeing billing rates.', click the link below: