Om, The authorities will open a correction window tentatively during the months of May/June. During this period you can make changes to your application form. Ideally a small spelling error doesn't cause any issues during admission and counselling because you will submit original documents during the document verification. But if the spelling changes the whole word altogether, that is when you will have to change , But inspite of a spelling error, if the meaning remains the same, it is still fine. Having said that, because the correction window will open during May/June, you can make the necessary changes to your application.