How do I view invoices that I made in 2019 using the trial but on this same account?

Hi there, cade-dawsey.

If your QuickBooks Self-Employed free trial has expired, then viewing the previous data is unavailable unless you subscribed to the plan.

Here's how you can update the billing information:

1. Open your QuickBooks Self-Employed in your web browser. Please take note that the changes can't be made in the mobile app.
2. Go to the Settings > Billing info.
3. In the Payment Information section, select Edit.  
4. Update your credit card information, and then confirm your subscription. .
5. Click Update. 

Once updated, you can go to the Invoices tab on the left panel and then select the Last year from the drop-down list.

I'm adding this article for reference: QuickBooks Self-Employed Overview.

If you need anything else, just let me know and I'll get back to you. Thanks.