How to install the individual income tax declaration system? The installation of the individual income tax declaration system should follow the following steps: first, download the latest installation package from the local tax website, including installation instructions, and then install it step by step according to the instructions. Taxpayers of windows vista and win 7 operating systems should read the installation manual carefully before installing. Please upgrade the antivirus software virus database to the latest virus database before installation. Taxpayers who fail to install the installation package are recommended to use the installation free package again. When upgrading the software, you need to exit the individual income tax details declaration software. This upgrade does not affect the previous declaration data. During software installation, the user should check whether the system software and system hardware of the machine to be installed meet the requirements according to the installation manual. It is recommended not to share the same computer with the national tax invoice printing system. If the software cannot be installed normally, please exit the anti-virus software and firewall software on the machine first, and then install the software. Please use the normal size of the Windows font (96 DPI). This is the relevant law about your problem.