When You find this message:
This document is password protected.
Please enter the password below.
And you have NEVER set any password for this PDF file.
Simply use Google Chrome brower, then you can open the PDF file without enter any password.
此文档受密码保护。请在下面输入密码
从税务局下载的文档保存后,显示需要密码才能够打开
输入各种密码都打不开?
在线的解锁网站也不行?方法很简单。
如下图所示试试用谷歌浏览器,就可以打开了。