Checking Approved checkbox from service order taskbar you firstly approve billable issue and secondly the entire service order as well. So the invoice date is entered in the field fpr billable issue as the current date. Furthermore:

• billable issue us marked as Approved
• service order, that is service receipt is marked as Approved
• service issue is marked as Approved, and the current date is entered as the invoice date (it is less important with service orders since such issues are not normally included in VAT records)

Before proceeding, you have to condirm the operation (see Do you really want to approve the service order?). Because approving documents also means changing invoice dates which is the most significant factor in proving the validity of VAT records, it is not allowed to approve once more a document which is arleady approved and in such a case an error is returned.

Close the window clicking .

Solution:

1. Do not make any changes in the document.

2. If you want to make any changes to the billable issue nevertheless, you can do this opening and correcting the document.