Versions 2 and 3 of TallyJ can be installed for private use locally or nationally.
Installation of TallyJ is supported on IIS or Azure. Instructions can be found here, but you will need to contact Glen Little for access to the installation files. Once it is installed, you will have a local system identical to the web site at https://tallyj.com and all your tellers can access your copy of TallyJ from their browsers.
Version 1 of TallyJ is no longer recommended, but is still available for download here. It works only with Internet Explorer and each teller must have a copy of TallyJ 1.85 on their computer. You can see this site for more information, and full instructions are included in the download file.