Generate the models and migrations for incoming invoices.

app/Models/Incoming.php

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+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class Incoming extends Model
+{
+    public $timestamps = false;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<int, string>
+     */
+    protected $fillable = [
+        'supplier_id',
+        'invoice_number',
+        'issue_date',
+        'due_date',
+        'invoice_type_code',
+        'currency_code',
+        'net',
+        'gross',
+        'tax',
+        'pay_date',
+    ];
+
+    /**
+     * Get the supplier of the incoming invoice.
+     */
+    public function supplier(): BelongsTo
+    {
+        return $this->belongsTo(Supplier::class);
+    }
+
+    /**
+     * Get the items (invoice positions) of this incoming invoice.
+     */
+    public function items(): HasMany
+    {
+        return $this->hasMany(Incomingitem::class);
+    }
+
+    /**
+     * Get the tax subtotals for the incoming invoice.
+     */
+    public function taxes(): HasMany
+    {
+        return $this->hasMany(Incomingtax::class);
+    }
+
+}

app/Models/Incomingitem.php

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+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class Incomingitem extends Model
+{
+    public $timestamps = false;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<int, string>
+     */
+    protected $fillable = [
+        'incoming_id',
+        'name',
+        'article_number',
+        'description',
+        'amount',
+        'discount',
+        'tax',
+        'price',
+        'total',
+    ];
+
+    /**
+     * Get the invoice the item belongs to.
+     */
+    public function incoming(): BelongsTo
+    {
+        return $this->belongsTo(Incoming::class);
+    }
+}

app/Models/Incomingtax.php

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+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class Incomingtax extends Model
+{
+    public $timestamps = false;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<int, string>
+     */
+    protected $fillable = [
+        'incoming_id',
+        'taxable_amount',
+        'amount',
+        'percentage',
+        'currency',
+    ];
+
+    /**
+     * Get the incoming invoice this tax belongs to.
+     */
+    public function incoming(): BelongsTo
+    {
+        return $this->belongsTo(Incoming::class);
+    }
+}

app/Models/Supplier.php

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+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Supplier extends Model
+{
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<int, string>
+     */
+    protected $fillable = [
+        'name',
+        'registration_name',
+        'email',
+        'address',
+        'city',
+        'zip',
+        'country_code',
+        'tax_fc',
+        'tax_vat',
+        'contact_name',
+        'contact_phone',
+        'contact_email',
+    ];
+
+    /**
+     * Get the supplier's incoming invoices.
+     */
+    public function invoices(): HasMany
+    {
+        return $this->hasMany(Incoming::class);
+    }
+}