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For both our forms, the numbers in Columns A, B, and C are the same (eg, $100, $120, $60, respectively). So I should report these numbers in both his and my return (enter it once for each return), allocating 100% to me and 0% to him? 

I’m confused by what you said here: “However, if both forms are reporting the same amounts, you will not want to enter both forms as your overall numbers would be double what they should be. “