Definition of 1040 form noun from the Oxford Advanced American Dictionary

 

1040 form

 noun
noun
NAmE//ˌtɛn ˈfɔrt̮i ˌfɔrm//
 
 
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an official document in which you give details of the amount of money that you have earned so that the government can calculate how much tax you have to pay
See the Oxford Advanced Learner's Dictionary entry: 1040 form