Angela_T the answer you provided about uploading checks does not work. There is no Upload Transactions option under Banking and there is no Transactions menu option.

I can share some additional information with uploading checks in QuickBooks Online (QBO), @sfliquidationtru.

If you're viewing QuickBooks Online (QBO) in Business view, you can find the Banking tab as Transactions tab. Check this article: Switch between Business and Accountant view in QuickBooks Online. That will show you how to switch between views and check the difference between the two. 

Please take note that you can only upload transactions from a (QBO) format, CSV, or Quicken (QFX) file. Then, review the format of your file. 

Follow the steps on how to upload the check transactions:

1. Go to the Banking menu or Transactions menu and click the Banking tab.
2. Choose the tile for the account you want to upload the transactions into.
3. Click the Link account drop-down and select Upload from file. 
4. On the window that appears, click the Browse button and choose the file that you’ll be downloading. 
5. Click on Open, then Next.
6. Follow the onscreen instructions. Match the columns on the file with the banking fields in QuickBooks, then select Next.
7. Click on Let's go. QuickBooks will now add the transactions to your account.

Check this article for more information about downloading and uploading transactions manually: Manually upload transactions into QuickBooks Online.

You can now match and categorize those transactions and reconcile them to ensure your books are accurate and there aren't any duplicate transactions:

• Categorize and match online bank transactions in QuickBooks Online
• Reconcile an account in QuickBooks Online

If you have other questions about adding your check transactions, I'm happy to answer them for you. Just post it here as a reply and I'll take a look at it. Have a good one!

@sfliquidationtru 

Prepare your Checks data with the following template

then utilize an importer tool

https://transactionpro.grsm.io/qbo