If your returns have already been filed you will have to file an amendment. Amendments are filed on form1040X and must be mailed in and cannot be e-filed.
Please see the link below. This will guide you on how to file an amendment.
Please note: Form 1040X will not be available until 2/7/19.
Did you file a 2017 return and need to amend it to add the W2?
Or do you need to file an original 2017 return?
How to amend a 2017 online return. You will need to use a full windows or Mac computer.
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If your returns have already been filed you will have to file an amendment. Amendments are filed on form1040X and must be mailed in and cannot be e-filed.
Please see the link below. This will guide you on how to file an amendment.
Please note: Form 1040X will not be available until 2/7/19.