Https://skedit.zendesk.com/hc/en-us/community/posts/20445335479196-Error-3171-modifying-invoice-before-closing-date-in-QuickBookshttps://skedit.zendesk.com/hc/en-us/community/posts/20445335479196-Error-3171-modifying-invoice-before-closing-date-in-copyright https://skedit.zendesk.com/hc/en-us/community/posts/20445335479196-Error-3171-modifying-invoice-before-closing-date-in-copyright