Can I edit or cancel an OMS order after it’s placed?

It depends on how far the order has progressed — early orders can be edited, later ones need support.

You can edit an order while it is still early (before inventory is allocated and warehouse work starts). Once picking or shipping has begun, changes are restricted to protect what’s already been done.

1. Open the order and check its status. If it is still new / unallocated, edit the lines or cancel it directly.
2. If warehouse work has started, cancel only the unpicked lines, or contact support to split the order.
3. Shipped orders can’t be changed in OMS — handle returns through the RMA / returns flow instead.