How to autofill form with id from the previous Form

I'm trying to autofill form with id of techinician from the previous form after clicking add button

    @extends('Layouts/app')
@extends('Layouts.master')
@section('content')
@if(count($errors))
    <div class="alert alert-danger" role="alert">
    <ul>
    @foreach($errors ->all() as $message)
    <li>{{$message}}</li>
    @endforeach
    </ul>
    </div>
    @endif
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>



    <script type="text/javascript">

    var getMetiersByTechnicienUrl = "{{url('/metiersbytechnicien')}}";
 var getTachesByMetierUrl = "{{url('/tachesbymetier')}}";

//console.log(getMetiersByTechnicienUrl,getTachesByMetierUrl,
getTarificationsByTacheUrl);
    function getMetiersByTechnicien(val) {
    if(val.length>0) {
        var technicien_id = val;
        $.get(getMetiersByTechnicienUrl+'/'+technicien_id,function(res) {
            var html = '<option value="">-Select-</option>' ;
            $.each(res.metiers,function(index,item) {
                html+='<option value="'+item.id+'">'+item.libelle_metier+'</option>';
            });
            $('#metiers').html(html);

        });
     }
 }
    function getTachesByMetier(val) {
         if(val.length>0) {
        var metier_id = val;
        $.get(getTachesByMetierUrl+'/'+metier_id,function(res) {
            var html = '<option value="">-Select-</option>' ;
            $.each(res.taches,function(index,item) {
                html+='<option value="'+item.id+'">'+item.libelle_tache+'</option>';
            });
            $('#taches').html(html);

        });
        }
        }

        </script>
    <div class="container">
        <div class="row"></div>
        <div class="col-md-12">
        Z
        <div class="col-md-10">
        <h1>Tarification tache</h1>
        <form action=" {{url ('tarification')  }}" method="post">
         {{csrf_field()}}

        <div class="form-group">
         <label for="technicien">Technicien</label>
            <select onchange="getMetiersByTechnicien(this.value)" name="technicien_id" 
        id="technicien" class="form-control">
                <option value="">-Select-</option>
                @foreach($technicien as $t)
                    <option value="{{$t->id }}">
                        {{$t->user->nom}}
                    </option>
                @endforeach
            </select>
        </div>
        <div class="form-group">
        <div class="col-md-12">
                <div class="col-md-4">
        <label>Metier: </label>
        <select onchange="getTachesByMetier(this.value)" style="width: 200px"    
        class="productm form-control" id="metiers">
             <option value="">-Select-</option>


        </select>
                </div>
                <div class="col-md-4">
                    <label>tache: </label>
                    <select style="width: 200px" class="productname form-control" 
    name="tache_id" id="taches">
                        <option value="">-Select-</option>
                    </select>
                </div>
                <div class="col-md-4">
                    <label>tarification: </label>
                    <input style="width: 200px" class="productname form-control" type="text"  
 name ="Tarif" class="form-control" value="{{old('tarif')}}">
                       
                    
                </div>


            </div>
            </div>
            <div class="form-group">
            <input type="submit" value = "enregistrer" class="form-control btn btn-primary">
        </div>
        </div>
            </div>
        </div>

@endsection

tarificationcontroller:

<?php
    namespace App\Http\Controllers;
    use Illuminate\Http\Request;
    use App\tarificationtache;
    use App\technicien;
    use App\tache;
    use App\metier;

    class TarificationController extends Controller
    {
    /**
    * Display a listing of the resource.
    *
    * @return \Illuminate\Http\Response
    */
    public function index()
    {
    $Listtache=tache::orderBy('libelle_tache')->get();
    $Listtarification=tarificationtache::all();
    return view('tarification.index',['tarification'=>$Listtarification]);
    }

/**
    * Show the form for creating a new resource.
    *
    * @return \Illuminate\Http\Response
    */
    public function create()
    {
    $technicien = technicien::orderBy('id','desc')->get();
    $taches = Tache::orderBy('libelle_tache', 'asc')->get();
    $metiers = Metier::orderBy('libelle_metier', 'asc')->get();
    return view('tarification.create')->with('taches', $taches)->with('technicien', $technicien)- 
    >with('metiers', $metiers);
}

/**
* Store a newly created resource in storage.
*
* @param  \Illuminate\Http\Request  $request
*@return \Illuminate\Http\Response
*/
public function store(Request $request)
{

    $tarification = new tarificationtache();
    $tarification ->tache_id = $request->input('tache_id');
    $tarification ->Tarif =$request->input('Tarif');
    $tarification->save();
    $tarification->techniciens()->attach($request->technicien_id);
    return redirect('technicien');  }

/**
    * Display the specified resource.
    *
    * @param  int  $id
    * @return \Illuminate\Http\Response
    */
    public function show($id)
    {
    //
    }

    /**
    * Show the form for editing the specified resource.
    *
    * @param  int  $id
    * @return \Illuminate\Http\Response
    */
    public function edit($id)
    {
    $tache=Tache::find($id);
    return view('tache.edit',['libelle_tache'=>$tache],['Tarif'=>$tache],['metier_id'=>$tache]);
    }

/**
* Update the specified resource in storage.
*
* @param  \Illuminate\Http\Request  $request
* @param  int  $id
* @return \Illuminate\Http\Response
*/
    public function update(Request $request, $id)
    {
    //
}

/**
    * Remove the specified resource from storage.
    *
* @param  int  $id
    * @return \Illuminate\Http\Response
    */
public function destroy($id)
{
    $tache =Tache::find($id);
    $tache->delete();

    return redirect('tache');
}
public function getTarificationsByTache($tache_id)
    {
    $t =tache::find($tache_id);
    return response()->json(['tarifications' => $t->tarificationtache]);
    }