Please check and amend the VAT rate on the uninvoiced timesheets.
If the timesheets were created/imported before the change was made they will have the old rate if not overwritten at timesheet or assignment level.
If this rate is no longer valid in the system this will prevent invoices from being generated.
In the event that the timesheets can no longer be amended, you will need to reverse the timesheets with a negative adjustment timesheet and submit new timesheets using the correct VAT rate.
