You can enter transactions on the main customer & not the job. Sounds like you may have a payment or a credit memo on the main customer.

Resolution for 'costumers job issue: 'I have a costumer has a lower balance then the same costumers job. how did that happen' available: Yes.

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

For more information about resolving issues related to costumers job in Quickbooks/QBO or to get support for the issue 'I have a costumer has a lower balance then the same costumers job. how did that happen', click the link below: