To add an attachment click on the 
 button on the GL Note for VAT Return Header form.  An Attachment tab will be displayed in the Grid at the bottom of the form:

Click on the 
 button on the Grid and the Upload File pop-up box will open:

Click on the 
 button and select the required file from your network.  Once selected the file name will be displayed next to this button.
Click on the 
 button and the file will be added to the Grid:

On this form an attachment can be removed by clicking on the 
 on the left hand side of the grid or it be replaced by clicking on the 
 button.
Further attachments can be added by re-clicking on the 
 button - new lines on the Grid will be created for each attachment.