Hi clydeh,
Thanks for posting in the Community! There's no limit on the number of sub-accounts you can add on a parent account. Let me show you how to add a sub-account under an existing account.
- Go to Gear ⚙ icon and select Chart of accounts.
- Select New.
- Select the Account Type and Detail Type.
- Select Is sub-account and then enter the parent account.
- Give your new sub-account a name. You can also add a description.
- For the As of date, tell QuickBooks when you want your account to start. Then add the Balance in the account as of the date you choose.
- Select a Default GST Code. Note: Only some account types need this, like bank, credit card, asset, and liability. If you need help, you can learn more about opening balances.
- Select Save and Close.
You can also check this article for more information: Create subaccounts in your chart of accounts in QuickBooks Online.
Feel free to drop a comment below if you have any other questions. Have a great day!