For some reason over 120 old transactions have come back. How can I fix this

I can help you fix bank transactions that are being downloaded twice, Greenearth.

If these transactions are already categorized, you can exclude them to avoid duplicates. Let me show you how: 

1. Log in to https://selfemployed.intuit.com/.
2. From the Transactions, use the filter icon to easily locate the old transactions.
3. Select all those you'll exclude.
4. Click the Exclude icon and then Apply.

You might also want to check your bank's website to verify if there's a maintenance that caused the old transactions to download again. Feel free to use these links on how to handle transactions in QuickBooks Self-Employed:

• Schedule C and expense categories in QuickBooks Self-Employed
• Handle duplicate transactions in QuickBooks Self-Employed

I'm just around the corner if you need more help. Take care and have a good one!