Boot your RT device and log in, allow it to sit on the desktop for about a minute.
Extract all files out of the latest version of the .ZIP attached to this post. To do this on Windows RT, right-click on the .zip, choose 'Extract all', and select the destination folder.
Run runExploit.bat. It'll prompt you to either install the jailbreak to run on login, uninstall it not to, or run the jailbreak once.
Choose an option and follow all subsequent prompts. They're all quite easy and self-explanatory.
Download app:- RT Jailbreak(latest) v1.11
OR Scan for QR Code here
For Old version 1.01 Scan here
Beware!!! First Read the FAQ's here
Best luck Jailbreaking
Do Report for Broken Links