You want to know if Managed Tariff Code Classification shares information with AvaTax and Managed Returns.
Avalara Item Classification
Managed Tariff Code Classification doesn't share information with AvaTax unless your service subscription includes storage. Managed Tariff Code Classification maps items to Harmonized System (HS) codes, using the product API or FTP. If your service subscription includes storage, your classifications are stored in AvaTax Item Master. if you are using your classifications along with Cross-Border transactions within AvaTax, your HS codes appear in these applicable transactions.