Hi Nitin,
Sorry for the inconvenience.
You will find to edit all of the header content in the header.tpl file and all of the footer content in the footer.tpl file of WHMCS template.
Please don’t forget to give us ‘rating and review’ (on https://themeforest.net/downloads ), if you like our template and our support too. It will give us inspiration and make us more ‘happy’ to support.
Best Regards,
ThemeLooks Support Team