PerfectIt does not require any specialized training. It's easy to install, and its intuitive interface means you can be up and running in seconds. However, to get more from PerfectIt, or to receive PerfectIt instruction at your workplace, you can take an online course or contact a local training provider.
Cadman training offers an online course dedicated to PerfectIt. It covers everything you need to get started as well as help on more advanced features such as style sheets. It's called their Introduction to PerfectIt.
It's also possible to learn about PerfectIt in the College of Media and Publishing's Proofreading and Editing Course, and the Society for Editors and Proofreaders features PerfectIt in its course on Editing with Word.
Local training providers are shown below.
Australia and New Zealand