1. Take your tax registration certificate and service fee, and go to the Beijing National Tax Service Hall to find the door-to-door service staff of Zhongxingtong to renew the fee. You'd better go now, don't delay using it next month. This is irreplaceable on the Internet. If you pay the service fee, people will give you a new 3.5 hard disk (new authorization certificate). You can go back and delete the old certificate, and then install this new certificate.

2. Bring the enterprise digital certificate to the window of the industrial and commercial administration service center!

Send your application handler's ID card, power of attorney, business license of enterprise legal person (copy) and tax registration certificate (copy of national tax and local tax).

And valid certificates such as organization code certificate (copy), so as to avoid missing anything and have to come back. This is really troublesome!

3. If the general taxpayer is an enterprise version, copy the ca certificate with a USB flash drive and install it on the computer. The password was set when you bought it. You can install it once (you can reinstall the system later). When applying, set the website as a trusted site in the Internet tool, click "General Taxpayer Application", and select the installed certificate in the pop-up window. If it is an agent version, you need to insert the dongle that was given at the time of purchase into the computer through the usb interface, and select the enterprise that pops up the window at the time of declaration.

4. First, put the CD in the box into the CD-ROM drive, and install the driver on the computer according to the prompts. After installing the driver, you can use the digital certificate to log in to the digital certificate of the organization, and you can use the digital certificate to log in to the website of the relevant department for business operation. Log in to the national tax network, select certificate login at the general login place, insert digital certificate, and fill in the PIN code (default is 123456). After logging in, you can choose industry newspaper to declare income tax.