Navigate to the Sales Invoice Batches screen and hit the 'Create Batch' button in the top right. Then, a pop-up window will appear for the batch details to be entered.
Enter an Invoice Date as well as a Batch Label.
Be mindful of what is entered as the Invoice Date because invoice due dates will be calculated off this date taking into consideration payment terms as well.
Once entered select: 
This screen displays un-billed timesheets, grouped according to the settings in each Client record.
All columns can be searched and sorted.
Sales Ledger Code – The sales ledger code linked to the assignment.
Client Name – The client the timesheets belong to.
Last Billing Date – The most recent date invoices were generated for this client.
Group By – How invoices are grouped, as defined in the Client record.
Billing Cycle – Indicates whether the client is billed weekly or monthly.
Timesheet Count – Number of timesheets included in the batch.
Net (£) – Total net value of all timesheets in the group.
Tax (£) – Total tax amount for the group.
Gross (£) – Total gross value (Net + Tax).
Actions – Click View Timesheet List to see the timesheets within the group.
If the user would like to view the timesheets that are in the group before adding to the batch, click on the Actions icon 
This screen displays individual timesheets within the selected group.
Timesheet Number – Unique reference for the timesheet.
Contractor – Name of the contractor the timesheet relates to.
Contractor Type – Classification of the contractor (e.g., PAYE, Inside IR35, or Other).
Date – The period covered by the timesheet.
Received Date – The date the timesheet was submitted.
PO Number – Displays the linked Purchase Order number (if applicable).
Location – The assigned location (if applicable).
Net (£) – Net amount for the timesheet.
Tax (£) – Tax amount for the timesheet.
Gross (£) – Gross total (Net + Tax).
Adding Timesheets to a Batch
To include all timesheets, click the Select All checkbox.
To include specific timesheets, tick them individually.
Once selections are made, click Add to Batch to include them in the billing batch.
Update Batch
Select the relevant timesheets and update the batch to add these timesheets to the Batch.
The Batch will now move to Pending status