When an employee forget to checkout  attendance after 10 hours attendance should be check out automatically in odoo .  also added one selection field it should be filled when 10 hours completed and auto checkout.

class HrAttendance(models.Model):
    _inherit = 'hr.attendance'



    actives_id = fields.Boolean(compute='_compute_forget_logout',store=True)
    att_forget_logout = fields.Selection([('forget_logout', 'Forget Logout')], string='Forget Logout')

    @api.depends('check_in', 'check_out')
    def _compute_forget_logout(self):
        for rec in self:
            check_in_time = fields.Datetime.from_string(rec.check_in)
            print(check_in_time, '.............................check_in time')
            logout_time = check_in_time + timedelta(hours=10)
            if datetime.now() > logout_time:
                rec.actives_id = True
                rec.att_forget_logout = 'forget_logout'
            else:
                rec.actives_id = False
            rec.write({
                'check_out': fields.Datetime.now(),
            })