Amending your return means filing a new form, 1040-X. This is only required in certain situations. Please view the link here that will help you determine IF you need to amend. https://ttlc.intuit.com/replies/3318732
Also, here is the link for instructions on how to amend your 2016 & 2017 taxes: https://ttlc.intuit.com/replies/3288565
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