Yes, you can switch from another fulfiller to merchOne. However, please note that you must create products on merchOne in backend, change the fulfiller, and copy/paste the merchOne SKU in the product variation section. 

1. Access your store, find the product you want to edit, then click the three dots on the right. Select Edit Product Information. 


2. Go to Prices section and click on Copy icon, which is located next to the SKU code, then you will receive message SKU was copied to the clipboard.