You are going to America tomorrow you have an esta which you used in February to America but you have lost the form Do you need another form or is it all stored on the system?

If you are from a visa waiver program country which i assume you are, you don't need the printed form to enter the U.S. your info will still be in the system but some airlines will require you to show the form when you check in. If you have your ESTA application number you can access the ESTA via the ESTA website and print it off. If you don't have the number you will have to reapply. Go to the official ESTA website-see related link below- (not one of the ones that charge you. A ESTA is free) and resubmit your details. I would check with airline first.