Hi Ashish,

I hope you are doing good. Now Coming to your query, Dear you can't change/edit your choices once you locked it even though you choose float option. But the advantage of choosing the float option is that if you get some college in the first round but you are not satisfied with it and want to go for some better college so then you choose float option So then if you get some better college than this in 2nd round then you can go for it otherwise the same old which you got in 1st round will be reserved for you.

I hope this helps.

All the best.

Thank you.