I didn't see your replies until now Mr. Tfoti. Based on the lack of replies it doesn't seem like anyone uses ITA. 

 do a full blown TAX PLAN before you could use the estimated tax payment program in the Tax Advisor program.

I don't think this is correct.  I have used the Estimated Tax Plan in ITA without using the full TAX PLAN. There is nothing that I found in the Intuit guidance such as "Getting Started" that resolves your dilemma.

@tfoti