Hi Zh Y,
Adding to what MoazzaM is indicating, you could also use Pricing Type -
C - Copy Pricing Elements unchanged and change Auto Price Components;
G - Copy Pricing Elements unchanged and change Tax Amount;
Depends upon your scenarios. In case you have some manual pricing in the Sales Order whether - Freight, Discounts or Surcharges, you may not want to touch those and want them to change.
Thanks.