It often happens – a person enters the United States of America with a US Visa applicable for a limited period of time but later he or she decides to stay for a longer period. If you are in a similar kind of situation and want to apply for visa extension while you are still in USA and your visa period is going to end soon, you can do that by following a specific procedure, which will mainly depend on which type of Visa you are holding. There are certain eligibility requirements that you must fulfill in order to get extension.