I am new to upwork and I want to register as auto entrepreneur in France. So visited official website (https://www.infogreffe.fr) but could not find upwork in the list of enterprises. How do I register in order to get KBIS certificate?
First of all that is not the official site for autoentrepreneurs in France and a K-bis certificate is completely different from being an autoentrepreneur, and has nothing to do with Upwork. If you are a permanent resident in France and you want to work here, you need a work permit if you haven't already got one. If you have, this is the official autoentrepreneur website:https://www.net-entreprises.fr/lautoentrepreneur/accueilgeneriquemdp.htm
If you want to set up a commercial company in France, then you have to register your company and eventually - simplistically put - you will receive a K-bis certificate.
Whatever you decide to do, make sure you have a native French person to make sure you have understood all the details. The working system in France is extremely complicated.