Now I understand! On the thread you sent, one of the experts replied to basically the same question I had asked: That the question on the form is referring to if any of the lump sum I received in the current year (not my husband) was reported in the previous year. So yes, that should be zero - even though there is an amount on the 2021 Line 6B return, it's my husband's, not anything to do with my lump sum received in 2022. Thank you for everything!
