The following code can be used in the email/invoice templates to get tax and recurring billing properties at the order line item level. This requires RazorCart v2.1.8
@foreach (var item in Model.Order.OrderDetails)
{
bool taxExempt = item.TaxExempt;
decimal taxableAmount = item.TaxableAmount;
bool isRecurring = item.DetailRecurring.IsRecurring;
DateTime startDate = item.DetailRecurring.StartDate;
DateTime endtDate = item.DetailRecurring.EndtDate;
string startDateSetup = item.DetailRecurring.StartDateSetup;
string subscriptionInterval = item.DetailRecurring.SubscriptionInterval;
int recurringOccurances = item.DetailRecurring.RecurringOccurances;
}