A 1040EZ form no longer exists for tax year 2018. There is only one form 1040 with new Schedules 1-6 that are used to file all tax returns.
You can get a copy of the form 1040 at this link: https://www.irs.gov/pub/irs-pdf/f1040.pdf
You can get copies of the schedules 1-6 at this link: https://apps.irs.gov/app/picklist/list/formsPublications.html?value=1040&criteria=formNumber
