When you access your account and navigate to the "Transactions" tab, you can click the option for "advanced search." In here you can enter your customized search criteria, for example, all orders with a status of complete.
After you enter and run your search you will see your list of results. On the left side you will see a check box next to each results as well as a check box at the top of the results that will select the whole page. From here you can go to the "actions" drop down in the upper right corner of your screen. Archive will be an option here and will modify all selected results.
Since you're using the Fulfillment platform, for a faster way to contact support, please use the blue messenger icon in the bottom right-hand corner of your Fulfillment account. Our messenger team is available 8a-4p CST to assist you with any Fulfillment questions!