Hello there, @angie36.
Let's get this invoice concern sorted out so you can get back on track.
Having invoices to show as aging the same as the date that it was entered can be caused by the stored data on your browser. QuickBooks Online gathers cache files for faster browsing, but too much can cause odd behaviors in the system.
To fix this, I suggest accessing your account through a private window. This allows you to utilize QuickBooks in a clean slate. If the invoice is no longer showing as aging, you can now go back to your regular browser and clear its cache. This is to remove those corrupted files and prevent this problem from happening again.
I'm also adding here some references about editing due dates and managing terms in QuickBooks Online for your guide:
You can always visit me here if you have any other questions. I'll be around to help. Take care!
