A defined benefit plan has mandatory employee contributions. A plan participant terminates with 0% vested employer contributions. The plan makes a lump-sum distribution of the employee's own contributions, plus earnings.
Is this distribution reported on Schedule R, Line 3? Clearly, a lump-sum distribution has been made, but was a "benefit" distributed to a "participant"? For the purposes of Schedule R, a "participant" is someone who, at any time during the plan year, had an accrued benefit in the plan. Accrued benefits include both forfeitable and nonforfeitable amounts.
Would you report the lump-sum distribution? The Schedule R instructions specifically say not to report lump-sum distributions of elective deferrals, but there's no mention of mandatory, after-tax employee contributions.