When filing jointly, you ask if the dividend belongs to person A, person B, or both. How do you define who it belongs to?

We are filing jointly and TurboTax is asking if a dividend belongs to person A, person B, or both.  How  should we determining whether to choose A(me),  or B(my spouse), or both?  If filing jointly, should we be choosing 'both'? Or do we simply select "(belong to)both" only when both spouses' names are on 1099-DIV form?