Query tax rate adjustment invoicing 16%, 13%?

Shipment was made before March 3, 20 19, and the price of 20 19 was not negotiated and confirmed, so the invoice could not be made at 16% in time. In the company, the shipment before March 3, 20654381day shall be declared in advance at the tax rate of 16% (the price is the estimated price), and the price of July 20 19 shall be confirmed. Now, the company will deliver the goods at the tax rate of 3 16% on March 2009.