Problem to save a Form_tag with remote true

Good morning, I have a problem saving my form_tag data, I think it may be a syntax error or ignorance since I'm new to Rails and web development, my problem is that I'm using my form_tag as follows : '

<%= form_tag(controller: "payrolls", action: "actualizar", method: "post", remote: true) do%>

When I give the submit it saves me the data but it also renders me the partial to update and I would not want it to do that, but if I do not believe the update.html.erb it throws me an error 204 because it can not find the template, it should be noted that in the update action I do not answer any, try with JS but it marks me error.

Thank you in advance for the help you can give me, regards.

Here is my update action:

def actualizar
  payroll_params[:payroll].each do |upd_params|
    params_employeewd= upd_params[:employee_wd_attributes]

    params_payroll = {:employee_id=>upd_params[:employee_id], :week_id=>upd_params[:week_id], :department_id=>upd_params[:department_id], :dias_trabajados=>upd_params[:dias_trabajados],
            :dias_vacaciones=>upd_params[:dias_vacaciones], :faltas=>upd_params[:faltas], :total_percepciones=>upd_params[:total_percepciones], :total_retenciones=>upd_params[:total_retenciones],
            :total_sueldo_bruto=>upd_params[:total_sueldo_bruto], :total_sueldo_neto=>upd_params[:total_sueldo_neto], :sueldo_fiscal=>upd_params[:sueldo_fiscal], :pago_impuesto=>upd_params[:pago_impuesto],
            :pago_eps=>upd_params[:pago_eps], :tipo_pago_fiscal=>upd_params[:tipo_pago_fiscal], :tipo_pago_eps=>upd_params[:tipo_pago_eps]}

    @payroll = Payroll.find(upd_params[:id])
    @payroll.update(params_payroll)

    @employeewd = EmployeeWd.find(upd_params[:employee_wd_attributes][:id])
    @employeewd.update(params_employeewd)

    @employee_wad = EmployeeWad.all.where(payroll_id: upd_params[:id])



    params_employeewad = upd_params[:employee_wad_attributes]
    params_employeewad.each do |employeewad|
      additional = employeewad[:id]
      importe = employeewad[:importe_ads]
      @employee_wad = EmployeeWad.find_by(payroll_id: upd_params[:id],additional_id: additional)
      if importe == '0'
        if @employee_wad 
          @employee_wad.destroy
        end
      else
        if @employee_wad
          @employee_wad.update({:importe_ads=>importe})
        else
          @employee_wad = EmployeeWad.create({:additional_id=>additional,:importe_ads=>importe, :payroll_id=>upd_params[:id]})
        end
      end
    end
  end
  respond_to do |format|
    format.js
  end
end

I no longer mark error simply always redirect me to the template to update, which I do not want.