@JADinAZ I think you are wrong about a new preparer, at least from a CA point of view. https://www.ftb.ca.gov/tax-pros/california-tax-education-council.html shows who needs to registered and the key sentence is 

"Who is required to register with CTEC?

Any non-exempt tax preparer in California who, for a fee or for other consideration:"

I highlighted the key portion of that sentence. I assume you are not IN California, so CTEC  is not an obstacle. 

From you description, they should be able to find a FREE service either through VITA or AARP programs near where they are. Thanks for taking such good care of them over the years, but it may be time to let them fly away from the nest. I have done this for 50 years. I told many of my clients to go away - why pay me if you can get it FREE - Many stayed because of the comfort level, some even because I had a nice different color folder each year.