Invoice backdate due to delivery before 1st April

Hi Joseph,

Can I backdate an invoice to a date before 1st april.

The situation is like this:
our sale went through a bumi-agent and the goods were delivered to the customer on 16th March. The goods had to go through testing and commissioning by the customers before they can be invoiced. But due to insufficient time for the process, the invoiced from bumi-agent to customers was issued on 6/5/15 (with gst but the customer requested the bumi-agent to revise the invoice with no gst). Hence, can we backdate invoice the bumi-agent on earlier date without gst? Or can we issue the invoice without gst and state a remark 'delivery performed on 16th march and attach DO as proof? I believe we have passed the 21 days rule

Thanks for the opinion

Time of a supply is the delivery of goods. Do the latter... issue normal invoice without GST stating goods delivered pre-GST.