Once the channels are connected and the listings are downloaded into your Selro inventory is to upload the current stock file. This is to make sure the stock levels in Selro are the the latest stock. If the stock levels in listings were correct at the time of downloading the items into Selro is correct, you can ignore this step.
To upload the stock file please go to Inventory -> Bulk Actions and use the file type 'Update Quantities CSV'.
Once the stock file is uploaded, please enable the 'Automatic Stock Synchronisation' by going into Inventory -> Inventory Synchronise