I can't add new clients.I received from you letter about my company address.After that, I added my company address but new clients I can't add.Could you help me, please?

Let me help you sort this out, @fin4bpro.

Are you trying to add a new customer or a new client under your QuickBooks Online for Accountant account?

If you're adding a new client as part of your QuickBooks Online for Accountant account, you'll to let your client  add you as an accountant on their QuickBooks. Once you’re added, you’ll receive an email invitation. Follow the rest of the steps below:

1. Check your email.
2. Click Accept Invitation button on the email.
3. Choose the user ID associated with the new client.
4. Ensure to use your user ID in accessing your new client’s account.
5. Type in your password.
6. Click Accept Invite.

You can also perform the following troubleshooting steps to make sure that error is not browser-related:

• Access to your QuickBooks Online account using an incognito or private browser. Kindly use either of the following shortcut keys:
  • Google Chrome, press CTRL  + Shift + N
  • Mozilla Firefox: press CTRL  + Shift + P
  • Internet Explorer: press CTRL  + Shift + P
  • Safari: press Command + Shift + N

• If you’re able to able to access your account without being prompted to update your billing information, you may want to clear the cache of your regular web browsers.
• To check any issues with your browser’s health and its compatibility with QuickBooks Online, you can also use the Browser Health Checkup Tool.

If the issue persists, I’d suggest reaching out to our Customer Care Team. A specialist will be able to conduct a thorough check on the root cause of your concern on a secured environment.

Feel free to leave a comment below if you have follow-up questions about adding a new client in QuickBooks Online for Accountant. I’m always here to help.