Hi,

To import existing suppliers (vendors) into Odoo, you can do it easily using the Import feature.

Please refer to the link:

1. https://www.cybrosys.com/blog/how-to-import-customers-and-vendors-in-odoo-17

This blog helps you understand how to import vendors into Odoo.

You can import data to an existing vendor in Odoo using the External ID.This is a powerful way to update existing records instead of creating duplicates.

steps:

1. Export vendor with external id

Exported data:

In this example, I just changed the Tax ID and imported the record. You can see that the vendor's Tax ID was updated, and a new vendor was not created.

Result:

Hope it helps.