You want to know if Managed Tariff Code Classification shares information with AvaTax and Managed Returns.
Avalara Item Classification
Managed Tariff Code Classification does not feed information into 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 and if you are using your classifications in conjunction with Cross-Border transactions within AvaTax, your HS codes will appear in those applicable transactions.