Why my accountant can not log into the account ? Is it restricted only to me , please be advised that I added him when I purchased the software Appreciate support.

I'm here to ensure your accountant can access your QuickBooks Online account, sharaf.

Beforehand, may I know how did you add the accountant and the error they encountered when logging in? Adding additional details will help us provide accurate steps to fix this. A screenshot would be a great help too.

If unsure, I recommend browsing this article to learn more about inviting your accountant: Manage Users in QuickBooks Online.

In the meantime, let's have your accountant log in to QuickBooks Online via a private window. Doing so helps us determine if this is a browser-related issue. Here are the keyboard shortcuts: 

• Safari: Command + Shift + N 
• Google Chrome: CTRL + Shift + N
• Mozilla Firefox or Microsoft Edge: CTRL + Shift + N

If it works, have them clear the browser's cache to ensure the program performs efficiently. Otherwise, they can use other supported browsers. They also provide the best and most secure experience with QuickBooks. 

Additionally, there's a maximum number of billable users you can invite to your QuickBooks account. To verify your limits and know what to do when you reach them, I suggest checking out this resource: Usage Limitation.

Feel welcome to the Community again if you have any follow-up questions or need additional assistance managing your users. I'm always ready to lend a hand and guarantee a seamless experience.