Where is the facility to submit ones transcript?

I can't see any option on my portal to drop my transcript. Can someone help? Thnx guys!

https://www.lse.ac.uk/study-at-lse/Graduate/Offer-holders/How-do-I/Secure
Check this page and click the first section titled "...submit the extra information you have asked for? (1)", scroll to the bottom and click the red button that says "open new information form".

Alternatively, if you aren't going to be sending the transcript yourself (e.g. your university will send it directly), take a look at the section right under which is titled "...submit an original transcript? (2)" - hope this helps