Thanks for posting in the Community today, @Peyton1. I'm here to help ensure you can enter the details of your sales receipt.
As our initial troubleshooting steps, let's use a private or incognito window to confirm browser-related problems. Use these keyboard shortcut keys below:
Google Chrome: press Ctrl + Shift + N
Mozilla Firefox: press Ctrl + Shift + P
Safari: press Command + Shift + N
Log in to your QuickBooks account and check if you can create a sales receipt successfully. If it works, go back to your regular browser and start clearing its cache to refresh the program.