This problem has been around for years and Quicken keeps ignoring it. Yet they don't ever forget to shake us down for our annual "subscription fee". This is a glaring error in the Lifetime Planner tool.
Agree, it would make the Lifetime Planner a lot better as the RMD can impact the planning big time……
Just be glad you have a planner; the Mac version has none of those tools and it's a real disappointment.
The word from the product team, via the moderation team, is that they don't plan to touch LTP for another "year or so" - other priorities and from a discussion awhile back, lack of development competence in the feature. In fact, the RMD update idea post/thread was archived, votes cleared and no longer shows up on the community search engine results. I would suggest you "report a problem" if you have not already done so.
It and other LTP active and archived ideas can be found here, for now:
would it work to set your age back to be younger? Maybe just temporarily to plan then reset. So you turn 70 1/2 when your age is actually 73.