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Noting my earlier question:

The instructions for Form 709, Page 3, Part 4, Line 1 seem quite clear that only the DONORS gifts are to be reported on Line 1 yet the software provider has added the spouses split gifts to Line 1 beginning with the 2020 return.

Can anyone provide documentation that the spouses gifting is required to be included on Form 709, Page 3, Part 4, Line 1?