I have the same question than the one asked in the link below but it concerns Odoo 12. As the resolution seems totally different,I preferred to ask a new one.
https://www.odoo.com/fr_FR/forum/aide-1/question/how-can-i-customize-the-address-format-4370

In Odoo version previous 12, it was possible to customize the address format.
You had to go to
sale -> configuration -> address book -> localization -> country with technical data enabled.

This option is no longer possible in Odoo 12 due to the new interface. How can I place the zip code before the city in quotation or purchase order? I am currently using Odoo 12 community edition.