Submitting an amended 1040 form is a process that is used when taxpayers need to make changes to their tax return after it has already been filed. This can be done by filing a Form 1040X, which is an amended version of the original 1040 form. The term 'REFILE' is used to describe the process of submitting an amended 1040 form. It is a six-letter word that is used to indicate that the taxpayer is resubmitting a form that has already been filed.