Hi,

you can simply send context with action. also can set field value using default_FIELDNAME in context.

this.do_action({
        views: [[false, 'form']],
        view_type: 'form',
        view_mode: 'form',
        res_model: 'expense.mode',
        type: 'ir.actions.act_window',
        target: 'new',

        context: {'key': value}                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      

}