The Lifetime Learning credit may be available on your tax return during the year in which you purchase and complete a professional development course. The credit is available for courses which qualify for job improvement skills, up to $2,000 (20% of the first $10,000 in tuition fees) per year. While I’m not an accountant I believe that courses in Lean Six Sigma probably qualify. A significant number of my online training students sign up after being advised by their career guidance counselors to get Six Sigma or Lean certification to help them get jobs. The Pyzdek Institute is on the Eligible Training Provider List for WIA funding in Colorado and in several other states.
There are, of course, various restrictions. Ask your accountant if you qualify for the Lifetime Learning Credit.