Hi there, SvitlanaP.
Welcome back to the QuickBooks Community. I'll ensure to provide details on how the Aging report reports work in QuickBooks Online.
Aging reports give you an overview of your customers’ outstanding balances, who are falling behind their payments, how much is still due, and how long they’re past due. That said, it might be the invoices are not yet paid when you selected the specific date. With this, the reports won't show accuracy because every time you run the Aging report it depends on or appears the current overview of customers’ outstanding balances. That's the reason why you'll receive different reports but totals will still be the same.
You can click this article to view different information about Aging and how the data appears in the report: Run an accounts receivable aging report.
Please refer to this article to see steps on how you can filter the report in QuickBooks to show specific accounts, customers, or format the layout so the right data shows up in the right place: Customize reports in QuickBooks Online.
Let me know if you have any other concerns about running reports, I'll be always here to help. Wishing you the best!
