When a vendor ships inventory directly to Amazon FBA, you should still enter the bill to your source warehouse, not the FBA warehouse. This is usually your local or default warehouse that you have set for FBA shipments in your ConnectStock file settings.
Here is why this matters.
ConnectBooks treats that source warehouse as the starting point for all FBA shipments. When Amazon reports a new FBA shipment, ConnectBooks automatically moves the inventory from the source warehouse to In Transit, and then into the FBA warehouse once Amazon confirms it was received.
If you assign the bill directly to the FBA warehouse, the inventory appears as if Amazon already has it, even though it has not been received yet. This makes inventory counts inaccurate and can cause sync issues. When ConnectBooks later detects the FBA shipment, it assumes the inventory came from your source warehouse. If it was never logged there, the movement will be wrong and your data will be off.
Even though the bill is entered to your local or source warehouse, that warehouse remains accurate. As soon as Amazon reports the FBA shipment, ConnectBooks automatically transfers the inventory out of the local warehouse and into In Transit. The local warehouse is only used as a temporary origin point, not as a place where the inventory sits. Because the transfer happens right away, your local inventory is not overstated and always reflects the correct balance.