A year ago, I integrated my POS system at the time with QBO. It didn't work out, and I think I'd like to undo the integration. How can I do that?

Hello there, pandemo1989.

Since this is an integration with QuickBooks and your POS, whatever is downloaded in QBO also reflects in the POS used. You'll want to contact your POS support directly on how to undo the integration.

If you're using Revel, check this article: Set up Revel Point of Sale. This has the contact support phone number. 

You got me if you have additional questions.

I actually reached out to Vend first.  They told me to talk to you.  :(

Hello, pandemo1989.

I appreciate your time reaching out to Vend for guidance on correcting your books. I'll take it from here and help you correct your numbers. 

A quick note before doing the processes below. Since we're editing reconciled transactions and accounts, this will affect your books and might mess up the accounting. If you're sure about rolling back the entries on a specific period, you can proceed with the steps. However, you might just be able to correct this with adjusting journal entries. If that's the case, I recommend consulting an accountant for guidance. 

When you say that the integration didn't work out, were the transactions incorrectly mapped to different accounts? Usually, the account mapping is likely the culprit on why there are discrepancies and issues in your books. 

In this case, you'll want to check the mapping in your Apps page. Most third-party apps let you change the integration settings directly on the page.

Simply go to the Apps menu, then click the My Apps tab. On Vend's section, click the Action button then select Settings (if available). You can also select Disconnect if you want to remove the integration. 

If the settings aren't available or if you're unable to change the account mapping, you'll want to check the options in Vend. I'd recommend checking out their help articles in their support page if necessary. 

Next, you can start deleting the entries and reconciliations.

Note: Be careful about doing this in QuickBooks Online (it doesn't have a backup feature since it's a cloud-based software). As mentioned before, you'll want to consult an accountant. They might be able to pinpoint which entry is causing issues in your books and correct it (this is better than deleting entire entries and starting all over again). 

Unreconcile your transactions first before deleting or correcting an entry. This article has the detailed steps: Undo or remove transactions from reconciliations in QuickBooks Online.

There are different steps on deleting transactions or correcting a sales tax payment. Open these articles for a guide: 

• Manage sales tax payments in QuickBooks Online (go to the Delete a sales tax payment section).
• Void or delete transactions in QuickBooks Online.

Finally, re-enter the transactions correctly. If Vend lets you re-import the transactions, you can do that instead of manually entering the records. When you're done, reconcile your bank account as a finishing touch. 

If you need to do other tasks in QuickBooks Online, please check out other guides here. 

Drop by in this thread again if you have more questions for QuickBooks Online. I'd be more than willing to help you accomplish your tasks.