Good Day!

To start using FBL, you may go to your seller center account > choose product > Fulfilled by Lazada. From here, it will lead you to BMS (Business Management System) wherein it will allow you to do the ff:
- create inbound order to send in the items to Lazada warehouse
- manage logistics attributes of your SKUs (shell life, serial number & barcode)
- monitor your inventory and its movement

In order to send products for FBL to Lazada warehouse, you may check on this article below: https://sellercenter.lazada.com.ph/seller/helpcenter/How-do-I-send-my-products-for-FBL-to-Lazada-warehouse-5496.html?spm=a2a15.helpcenter-psc-article.articles-list.32.50cd56c13RmwNE

With regards to the charges incurred for FBL, you may refer to this help center link: /article/what-is-the-cost-for-using-fbl-fulfillment-by-lazada-560300-hc

Hope this helps. Thank you!