There are a few reasons in which your Replenishment inventory totals may look different than what your total received/sold in Seller Central shows.

• Multi-channel orders were fulfilled – Amazon depletes your inventory, however, InventoryLab does not yet track multi-channel orders to link the inventory depletion to.
• You are in your trial period or are out of your trial and haven't synced your historical data - In a trial period, you only have access to the past 60 days of sales. If you add in your inventory and buy costs during this time, it will be off since it isn't pulling in all of your sales. If you are out of the trial period, follow the How Do I Get Data from Before I Signed Up for InventoryLab? article.
• Removal Orders (pre-2019) - Before changes in 2019, we did not track how removal orders affected your inventory. If you've accounted for these manually, you will need to add that inventory back into your replenishments, as we have automated this.
• Amazon received less or more than what was listed in InventoryLab – There may have been a receiving error when your shipment arrived, the quantity for the shipment may have been altered outside of InventoryLab, or you may have accidentally sent in more or less of what you stated you were sending in InventoryLab.
• Listing Outside of InventoryLab – when you list outside of InventoryLab, no replenishments are created.
• Declining or Deleting Shipments - If you declined a shipment in InventoryLab prior to July 2019, and did not later send that inventory in through Seller Central, those inventory quantities were not deleted from your replenishments. The same happens if you delete a shipment in Amazon and never recreate and send in that shipment.
  Currently, when you choose 'Decline All' in the Private Workflow, these items are automatically removed from your replenishments.
• Deleting MSKU out of Shipment Box Contents in InventoryLab - If you delete an MSKU out of your box contents in InventoryLab, you still need to adjust the replenishment made for that item.
• Sending Product Feeds through InventoryLab Without Creating Shipments - Sending product feeds only through InventoryLab creates replenishments for items. If you do not create and send in any shipments to account for these quantities, you will have an excess of inventory quantities in your replenishments.
• Expired Inventory - Amazon no longer creates disposal orders for these to track. They are just adjusted out of your inventory.
• You have unfulfillable inventory due to a customer return - This inventory is not added back into your replenishments. Instead of making corrections, you may want to remove these items and the quantities will be removed when you received them. (Unsellable Refunds from 2020 and beyond will no longer cause an inventory alert). 
• You are enrolled in Amazon's In-Stock Head Start Pilot program - Your quantities for certain ASINs will be double-counted between inbound and available. If this is the case for a certain MSKU, it is advised to not make corrections, but wait until all of your inventory is received at Amazon for the quantities to become correct.
• You had more sales for the MSKU than you entered quantities in InventoryLab for - This would be indicated by a negative number in the Remaining column as the sales are still added in, even when there isn't a sufficient quantity.
• You have unshipped MFN Sales. These sales will take quantity from Amazon's On Hand, but not from your remaining column just yet. In this case, you just wait until you ship the items.
• You have FBA orders that Amazon has not yet removed from your inventory. - Sometimes Amazon will take a quantity out of On Hand, but the order hasn't shipped yet so it hasn't been subtracted from your Remaining quantity. You will need to just wait until Amazon adjusts this out of your inventory.

Correcting your Replenishments

After finding the possible reason for your quantity difference, you can correct your replenishments by taking the following steps:

More Quantity than Amazon

If there is more inventory showing in your replenishments than your remaining On Hand from Amazon, you can click the quantity under the corresponding Sort Sequence and decrease the amount so that the First In, First Out sequence will apply correctly for your orders.

If the entire replenishment needs to be removed, you can delete the entire row.

Less Quantity than Amazon

If there is less inventory showing in your replenishments than your remaining On Hand from Amazon, you can click the quantity under the corresponding Sort Sequence and increase the amount.

You can also add a new Sort Sequence with different accounting information by clicking 'Add Row'.