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Here is the 2018 form.   Where does it show Code V or W for Box 17?  Why would it have anything to do with the AMT?

<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f1065sk1.pdf">https://www.irs.gov/pub/irs-pdf/f1065sk1.pdf</a>