Hello fagun,
Currently Tashan does not support footer widget area and we have no plans to include the option in the lite version.
If you’d like to create a footer widget area then I’d suggest starting with a child theme, register the sidebar in the functions.php and then add the call in the footer.php – you’d also need to do some CSS coding to get all working and looking good.
This is an involved process and is beyond this support forum. You can commission a child theme with the options over at wpstrapcode.com/support and will do our best to accommodate your requirements.
Regards,
Zulf