Let me share some insight about installing your version 19 Point of Sales (POS), Rainforest.

To prevent the invalid product code error, please ensure you enter the correct product code. You can find it in the purchase confirmation email if purchased online or on the packaging if purchased in retail stores. Alternatively, you can access the code via CAMPS if you have registered the product.

Once installed successfully, you'll be prompted to enter an activation code, which you can find online.

Additionally, POS version 19.0 has been discontinued as of October 23, 2023. Therefore, you will no longer receive any security patches or updates from us. Also, we can't provide you with the activation code after the installation. For more information, refer to this article: QuickBooks Desktop Point of Sale discontinuation.

On the other hand, consider switching to Shopify for a modern retail solution that extracts data from the POS and integrates with QuickBooks Desktop Financial Software.

We'd love to hear from you again. If you need additional guidance about QuickBooks POS, kindly add your inquiries below. I'll get back to you right away to continue assisting you.