Hi Dustin,
I've analyzed your requirement and I've good experience in PHP, Open_kart. I'm able to integrate our Quickbooks with website.
Please share website link & more details so I can provide you best solution.
I have over 7 years of work experience and have a strong knowledge on HTML5, CSS3, JavaScript, jQuery, PHP, MySQL, WordPress, Open-kart, Codeignitor, .NET, C#, MVC, Front-end & Graphic designing, SEO.
Looking forward to work with you.
Thanks and Regards,
Ashish