Substitute a ucas option

help!!! im still in the 14-day window and would love to swap a choice of mine simply because i realised i am actually eligible to apply for another university. i didnt think i was able too due to the entry requirements but i have found out that i am.

if i do substitute my choice, does it mean i will have to resubmit my entire application? will my college be notified of this? what will actually happen!

You just log inti your hub and go to the choice you want to substitute and click the button.
It doesn’t mean resubmitting although if you applied through a centre then the centre will be able to see your choices