Let's troubleshoot your web browser, Tim.
Based on what you've shared, I recommend clearing your cache and removing Intuit-specific cookies to remove old files, allowing the browser to retrieve fresh data. Alternatively, you can use other supported browsers and devices.
To learn more about managing Schedule C effectively: Schedule C and expense categories in QuickBooks Solopreneur and QuickBooks Self-Employed
If you have any further concerns, feel free to reply below.