Hello there, @naweed-hanifrajp.
Thanks for coming to the Community. I want to ensure I'm giving you the right information to your queries. May I know the specific details of your user access concern?
As an insight, QBO is a web-based application. Hence, any authorizes user can log into your QBO account in any location as long as he/she has an internet connection.
For more details about the different user access roles in QuickBooks, I'd recommend visiting this article: User roles and access rights in QuickBooks Online.
Come back to me if you need more help. I'm always around to guide you.
thing is I have 2 location and they both has different Tax ID and little different chart of Accounrts also different products and services too how can I lock used of location wise restrict not to see each other data like customer , suppliers, accounts too. ?
Afaik, Bitrix24 is only allowed to sync with one QBO account. Consider not connecting to your QBO directly and use a 3rd party connector as a workaround. You can set rules for a specific customer to integrate data with one QBO account.