Step 1 : Go to Setting Page
Step 2 : Find a Table section with Title “Invoice Option” & Click on “Edit” button on it.
Step 3 : On Invoice Option page you will find a option Bill of Supply Declaration, This Declaration text will show in Bill of Supply Type Invoice.
Step 4 : After Editing Options Click On Save Button at end of page
Step 5 : You can see Message on Next page For Details Updated.