To be able to manage your inventory effectively you need to set up your inventory management system properly. Be sure that you always have the right products in the right quantity, and that they are sold on time. Otherwise you may face "out of stock" problems or spending too much money on expensive stock that is taking up warehouse space.

• enable and configure inventory management in your Bitrix24
• set up reservation and product catalog 
• auto sale unshipped items when completing deal
• subscription for out-of-stock products
• "tax Included" option for new products and SKU's
  
• processing inventory objects even if stock is insufficient
  
• make out-of-stock items available for purchase
• hide certain products from the public part of the Online store (details here)

Don't forget that now you can also print Inventory Management documents and send them to customers (how it works).