Where to find ItunesConnect vendor ID - to publish book

Hi I uploaded by epub at authors.apple.com to publish on Apple Books. After uploading my book, it referred me to my ItunesConnect account to fill out title, author, isbn etc. It asks for my Vendor ID but I can’t find anything in my account called Vendor ID. In the business section, opposite my name and address, it does have a number but this is not specified as Vendor ID. It sits by itself on top of the words: 55 Countries or Regions. It is an eight-digit number but I don't want to rely on just the number of digits as confirmation it is the Vendor ID. Because I understand it’s very important to get your Vendor ID right, I’m hoping someone can help clarify where I find the number. I’ve googled the question, asked ChatGPT and Grok, looked at Apple.com info but none of the suggestions provided the desired result. I was told to look in the Sales section and Reports section to get my Vendor id but there is no info there at all. I expect nothing appears there until you’ve uploaded your book. I have asked the support desk but I've been told there may not be an immediate answer, which I understand, hence asking for help here. I really hope someone can help and thanks in advance.