Hi there, @Kelly21.

Thanks for joining us here in the Community. Allow me to share some steps to get this past due on invoices issue sorted out and get you back on track.

If you already tried performing the steps and checking all the details given by other members above, and the issue persists, I'd suggest running the verify and rebuild process to better isolate the issue. Verifying the data self-identifies data issues within a company file while rebuilding the data resolves data integrity issues. 

Also, I've found here some solutions and recommendations that would be helpful for this type of concern, please check out this link: Past Due Stamp.

However, if the problem continues after trying the steps given, I'd suggest reaching out to our Customer Care Team. They have the proper tools such as screen-sharing that can help investigate on this matter.  

That should do it.

Feel free to reach back out to me if you have any other questions concerning QuickBooks. I'm always here to lend a helping hand. Take care.