Hi, Margaret.
When I first started with Quicken and TurboTax in about 1990, I got the most sophisticated versions because my tax situation was pretty complex (Schedule C, limited partnerships, REITs, municipal bonds...and other things). But after several years - and a few Quicken editions - my financial life became less complicated. And I read the back of the Quicken box a little more carefully. Most of the premium features I was paying for were things that I didn't need anyhow. Much of the "tax advice" was simply copy'n'pasted from IRS publications, which by then were freely available on the Internet. (The little movies that started appearing on the annual CD-ROMs were cute - but not worth the added cost.) The various planning wizards were superfluous to me: I was already retired; my only child had finished college; and my finances were pretty much down to a few stocks and some CDs - which Quicken STILL doesn't know how to handle in ANY version.
Then I realized that Quicken Basic had ALL the actual functionality that was in the more expensive versions. And so did TurboTax Basic. After all, can you imagine the uproar if it turned out that TurboTax miscalculated your tax if you didn't buy the most expensive version?! The premium versions added bells and whistles, but the most basic versions had everything that was really needed for actually keeping track of all my finances and reporting my taxes.
So I switched to the Basic versions of both Quicken and TurboTax - and have never regretted it. Then Intuit abandoned the Basic version - or maybe just renamed it - and Deluxe became the baseline version, so that's what I use now.
It might be helpful (to you, Margaret, not to me) if you make a list of the Premium features that YOU use that are not in the Deluxe versions. Study the list and make up your own mind as to what those features are worth - to YOU.
To me, this is not a large matter anyhow. I just paid $40 plus sales tax for Quicken 2010 Deluxe. I don't have TurboTax for the 2009 year yet, of course, but last year I paid $50 plus tax for 2008 Deluxe. That's less than $100 for a year's worth of both home bookkeeping and tax programs that fit me very well. In my tax-only CPA practice before 1990, my minimum fee for an income tax return was $250. I consider the Quicken/TurboTax combination a bargain. Even if I had to pay 50% more to get the Premium Editions, it still would be a bargain!
Obviously, I'm not an unbiased appraiser of these values. You will have to decide how much weight to give my opinion in making your own decision.
RC