When printing the Purchase Order or saving it as PDF, the Purchase Order will display a "Bill to" address and the "Ship to" address.

Those addresses are not displayed directly on the Purchase Order card inside Katana, but only when you have chosen to print the order.

Bill to address - this includes your company legal name and legal address, which you can define from the Account section of Katana. Read more.

Ship to address - this is the address for the Location that has been assigned to the Purchase Order. You can define addresses for Locations from Settings -> Locations in Katana. Read more