How to Invite your Accountant or Bookkeeper to your QuickBooks Online Account
Sign in to your QuickBooks Online company.
Click on the Gear Icon > Manage Users.
Go to the Accounting Firms section (tab towards the top)
Enter your accountant's email address and first/last name (optional).
Click Invite. They will receive an email with a link for signing in to your company.
Click Next and Finish.