1040 line 62 instructions: page 104
https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
Line 62
Other Taxes
9.
Golden parachute payments. If you received an excess parachute payment (EPP), you must pay a 20% tax on it. This tax should be shown in box 12 of Form W-2 with code K. If you received a Form 1099-MISC, the tax is 20% of the EPP shown in box 13. Identify as “EPP.”