Avalara

Avalara is a 3rd party tax compliance software that can be used to dynamically assign tax codes based on Order and Yard Locations.

  code = $"{transactionNumber}";
    type = $"Sales{transactionType}";
    date = transactionDate.ToString("yyyy-MM-dd");
    customerCode = customerID;
    commit = "true";
    description = $"Sales {transactionType} for {customerID}";
    purchaseOrderNo = poNumber;
    lines = new List<Line>();

Tax Exemption options:

1) Set an entity use code on the order

2) IN AVALARA: Define a customer exemption

3) IN AVALARA: Define a specific PO for a specific customer exemption