Form 1040EZ as filed is commonly a short return: usually 1 page, sometimes 2, so the single page is very likely your complete return.
The mailing address to file your Form 1040EZ will
vary, depending on which state you live in (or if you live outside of the U.S.),
and on whether you enclosing a payment or not. Please see the following
IRS guide, "Where to File Addresses for Taxpayers and Tax Professionals
Filing Form 1040EZ":
https://www.irs.gov/uac/where-to-file-addresses-for-taxpayers-and-tax-professionals-filing-form-1040...
