Windows version of QB desktop only works on a Windows PC or  full Mac running Windows in parallels or equivalent. Not even the discontinued QB for Mac will install on an iPad.

Choices> export your company to an online QBO acvount you can access from every internet connected device you own

Or

Using a remote desktop program similar to Splashtop access your existing Windows PC from your iPad as if you were at your PC. I have had excellent results with Splashtop. And with a first gen ipad no less. For a nominal monthly fee you can even access your QB "server" across the internet. Free is fine if you can be on same LAN