This article explains how to fix time difference for order between Prestashop and myFulfillment, like in the example below
You user timezone is incorrect, to check it click on the "settings" icon in the top right corner and then select "Users" tab.
Option #2
If user timezone is correct, it probably means that your prestashop website does not use the GMT time to store order date time.
In that case, you can apply an hour shift when order are imported into myFulfillment
To do it, select menu integrations and go in your Prestashop integration.
Then select tab "Configuration" on the left, scroll down until "Order import" section and update "Hours shift" value:

Note: this setting applies only for the future orders imported in BMS