Hey aspirant,

JOSAA counselling which is organized by the conducting authorities of JEE mains and advanced Exams gives students an option to put their seats to float and wait for a better branch. A student can use float option once and it will be at float only until he/she goes for the freeze. So answering your question. , you can float for other college too, but once you freeze a seat you won't be able to change it.

Hope it helps!

Good luck.