Is there any way to fixed access token one time?

Hello there, @Farrukh Mehmood. I'll make sure to get help get the right support for your token access concern.

The Intuit Developer Forum is a great way to communicate with our product developers. I suggest you contact them. You can post the details of your token issue here. Many QuickBooks programmers, developers, and specialists are available to assist and guide you through the process.

Here's how:

1. Go to the Intuit Developer forum and sign in.
2. From there hover down and click Contact us under the Intuit column at the right pane.
3. Select QuickBooks Online.
4. Choose the Ask a Question button.
    

You may refer to this article for more details about obtaining an access token for an app: Obtain OAuth2 credentials for your app.

If you need assistance with QuickBooks chores, please visit our QuickBooks Help page for instructions, articles, and connections.

Please let me know if you have any other concern with your QuickBooks account. I'll be here to assist you. Have a blast