In this code is helful for you, change it right now.

partner_id=fields.Many2one('res.partner', 'Partner',change_default=True)

category_id= fields.Many2many('res.partner.category', id1='partner_id', id2='category_id', string='Tags',default=lambda self: self.env['res.partner.category'].search([('name','=','Employee')]))

Hello wizardz,

For set-up default value  of tags for customer you need to inherit res.partner and set default value.

Example :

class res_partner(osv.osv):

    _inherit = 'res.partner'

     def get_category(self,cr,uid,context=None):

         res=self.pool.get('ir.model.data').get_object_reference(cr, uid, 'base', 'res_partner_category_17')

         return [(6,0,[res[1]])]

     _defaults={

         'category_id':get_category,

     }

Hope this helps.