erpsaas/app/Filament/Resources/CustomerResource/Pages/CreateCustomer.php

<?php

namespace App\Filament\Resources\CustomerResource\Pages;

use App\Filament\Resources\CustomerResource;
use Filament\Pages\Actions;
use Filament\Resources\Pages\CreateRecord;
use Illuminate\Support\Facades\Auth;
use Squire\Models\Region;

class CreateCustomer extends CreateRecord
{
    protected static string $resource = CustomerResource::class;

    protected function getRedirectUrl(): string
    {
        return $this->previousUrl;
    }

    protected function mutateFormDataBeforeCreate(array $data): array
    {
        $data['type'] = 'customer';

        return $data;
    }
}