invoiceninja/database/factories/CreditFactory.php

<?php

use App\DataMapper\ClientSettings;
use App\DataMapper\CompanySettings;
use App\Factory\InvoiceItemFactory;
use Faker\Generator as Faker;

$factory->define(App\Models\Credit::class, function (Faker $faker) {
    return [
        'status_id' => App\Models\Credit::STATUS_DRAFT,
        'discount' => $faker->numberBetween(1, 10),
        'is_amount_discount' => (bool) random_int(0, 1),
        'tax_name1' => 'GST',
        'tax_rate1' => 10,
        'tax_name2' => 'VAT',
        'tax_rate2' => 17.5,
        //'tax_name3' => 'THIRDTAX',
        //'tax_rate3' => 5,
        // 'custom_value1' => $faker->numberBetween(1,4),
        // 'custom_value2' => $faker->numberBetween(1,4),
        // 'custom_value3' => $faker->numberBetween(1,4),
        // 'custom_value4' => $faker->numberBetween(1,4),
        'is_deleted' => false,
        'po_number' => $faker->text(10),
        'date' => $faker->date(),
        'due_date' => $faker->date(),
        'line_items' => InvoiceItemFactory::generateCredit(5),
        'terms' => $faker->text(500),
    ];
});