You can enable search-engine-friendly URLs for some public-facing pages.
Enable taxes in an individual product's configuration. WHMCS will not add taxes to each of your products until you enable them.
You can choose whether to allow customers to select the language that they see in the Client Area from a list of WHMCS's supported languages.
Export an individual client's data as a downloadable JSON file. You can use this to fulfill clients' requests for their own data.
Use the Universal Currency Converter to find and set a base conversion rate for each currency that you add to your WHMCS installation.
If more than one php.ini file exists, make sure to identify the php.ini file that your system uses when it executes the system cron job.
In some circumstances, you must force WHMCS to perform a license update.