Hi leokong18,

Thanks for reaching out here!  Missing transactions in QuickBooks Online can be concerning and affect your account balances.  I'd be glad to assist!

Although you can manually upload your transactions, you want to avoid duplicate entries.  In addition, it's important to note that any changes made to current transactions can have a negative impact on your books, if the account has been previously reconciled, I recommend undoing the reconciliations first.  Once you've successfully imported your transactions, you can proceed with reconciling your account in sequence.  When you're ready, follow these steps to upload your transactions in QuickBooks Online;

Initially, I recommend making note of the last transaction in QuickBooks Online, to prevent any duplicate entries. Follow these steps to locate the information:

1. From Settings ⚙ in the top right of your dashboard, select Chart of Accounts

2. Locate the account in your list and select Account History 

3. Write down the date of the Last Transaction

You're ready to log into your bank's website and select a date range for the transactions. Here's how;

1. Sign in to your bank or credit card's website.

2. Make sure the date range for the transactions according to the date of the last transaction in QuickBooks

3. Follow your bank's instructions to download your file in CSV format

4. Download your transactions and save the file where you can easily find it

5. Open and review the file to make sure it's in the correct format before you upload it.

Follow these steps to upload the transactions into QuickBooks Online:

1. Login to QuickBooks Online

2. From the Transactions menu, select the Banking tab

2. Click the blue tile for the account you're uploading the transactions into

3. Select the ▼ dropdown arrow beside Link account and then Upload from file

4. Hit Browse and select the CSV file you downloaded from your bank, then click Next

5. From the Account ▼ dropdown, choose your account and hit Next

6. Follow the onscreen steps to match the columns on the file with the correct fields in QuickBooks and hit Next

7. Select the transactions to import and continue through the prompts

8. Choose Yes to continue

9. When you're ready, hit Let's go!

If you notice any duplicate entries, here's how to remove them:

1. From the Review tab, checkmark the box beside all duplicated entries

2. Select Exclude from the tab that appears

Note: To permanently delete the transactions from the Excluded tab, select all items and then hit Delete. This process is irreversible and any transactions deleted in error will need to be recreated manually.

You're ready to match and categorize your transactions. In addition, you can set up Bank Rules so QuickBooks will automatically categorize the transactions that will save valuable time moving forward.

Here's a helpful guide for future reference, to assist with manually uploading transactions in QuickBooks Online.

If you have any other questions, please don't hesitate to reach back out. We'd be happy to help!