i purchased home and business for windows but can't find where to generate an invoice

Are you new to Quicken for Windows?

Welcome.
Please read this for more information, some videos and a list of resources to help familiarize yourself with Quicken:
https://www.quicken.com/quicken-tips
https://www.quicken.com/complete-guide-getting-started-quicken-windows

Quicken Help! (Quicken for Windows)

If you're unsure on how to do something, you can find more information about a specific task, function, feature or report in Quicken Help.
To access Quicken Help simply press the F1 key from anywhere in Quicken (or click Help in the Menu bar, then click Quicken Help).
 Once Help has started, use the Search tab to search using keywords, e.g., "buy security".
Some Quicken view screens may have a blue (or yellow) button with a question mark. Click it to get view - specific help.
A browser-based version is available here: https://help.quicken.com/display/WIN/Quicken+Windows+Help

To answer your question:

After setting up your personal and business bank accounts in Quicken, to get started with setting up a small business start reading here: https://help.quicken.com/display/WIN/Business