Trying to update from desktop to online

Hi, @jnjdow. Let me help you subscribe to QuickBooks Online (QBO).

Encountering an error that you can't add online to an existing subscription when you try to buy a fresh QBO means there's an existing account associated with your billing info. The existing account's status could be canceled or inactive, and you can either resubscribe to the old account or contact our support team to know the best way to proceed. Let me guide you on how to resubscribe and contact our support experts.

1. Sign in to your QBO account.
2. Go to the Gear icon, then select Subscriptions and billing.
3. For your QuickBooks plan, select Resubscribe, and enter the updated billing info.
4. Select Subscribe.
5. Sign out, then sign in again to go back to the Subscriptions and billing page.
6. Check the Next charge date. 

If you can't log in to your previous QBO account or have to subscribe to a different QBO subscription, you can contact our support team with their contact details at this link: QuickBooks Online Support.

QuickBooks Desktop and QBO are different accounting platforms. Let me add this resource to help you navigate this new experience: Self-help articles.

You're always welcome in the Community should you have further updates on subscribing to a QBO account. We'll do our best to assist. Take care.

@jnjdow 

Which QB Desktop year version do you have? 2016 or newer?