Hello, neuractor2-gmail.
I can share information about downloading Venmo transactions in QuickBooks Self-Employed(QBSE).
When you link Venmo account, QuickBooks will automatically download all recent transactions or it depends on what Venmo allows to download. It will be a combination of your personal and business transactions. You'll want to exclude some entries so only those people who paid only show. I'll show you how.
- Go to the Transactions menu.
- Find or locate the transaction you want to exclude.
- Select the Exclude.

- Hit Apply.
Also, you'll have the option to manually enter the transaction. Please follow this guide for your reference: Manually add transactions in QuickBooks Self-Employed.
In addition, you can review this material to check how your transaction is categorized to ensure it's in the correct line in the Schedule C report: Categorize transactions in QuickBooks Self-Employed.
Let me know if you have further questions about banking. Just leave a comment below and I'll be back to help you. Have a nice day!