How to Set Invoice Number When Creating AR Invoice Using .NET SDK

[divyang-vyas]

Hi,

I'm integrating with Sage Intacct using the official .NET SDK, and I'm able to successfully create an Accounts Receivable (AR) invoice via the SDK. However, I’m facing an issue where the invoice number I provide is not being saved in Intacct — instead, the system auto-generates the invoice number.

Here’s a simplified version of what I’m doing:

var invoiceCreate = new InvoiceCreate
{
InvoiceNumber = inv.InvoiceNumber.ToString(),
ReferenceNumber = inv.InvoiceOrderNumber,
CustomerId = inv.SageAccountNumber,
TransactionDate = inv.WeekendingDate,
DueDate = inv.WeekendingDate,
BaseCurrency = inv.BaseCurrency,
TransactionCurrency = inv.TransactionCurrency,
TaxSolutionId = inv.TaxSolutionId
};

Any help, code samples, or clarification would be greatly appreciated.