Explore Clearsale guide for Magento integration.
In the Magento connect website, search for "Clearsale" and Retrieve the installation key.
Paste the extension key into the "Install New Extensions" section. Click the "Install" button and wait for the process to complete, taking notice of any errors and correcting them if applicable.
Enable the ClearSale Magento Module at:
Magento Admin -> System -> Configuration -> ClearSale-> Total And Set your ClearSale account information.