You can change the number of days QuickBooks uses to calculate when invoices are overdue or almost due.
Choose Edit > Preferences.
Click Reminders in the list on the left.
Click the Company Preferences tab.
Only the QuickBooks Administrator can enter changes on the Company Preferences tab.
Enter the number of days you wish to use for overdue invoices on the Overdue Invoices line.
Enter the number of days you wish to use for almost due invoices on the Almost Due invoices line.
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