Cannot reconcile Fidelity Cash Mgt Acct - Balance mismatch

I don't think there's anything you can do to fix this other than to reconcile to the monthly statement instead of the online balance. Hopefully at some point they'll fix the "online balance" to match the balance held in the core position only, but the way things currently work with Fidelity is that all MMFs seemed to be lumped together in the account's cash balance.

Someone might want to hold a different MMF for tax reasons. SPAXX dividends are only partially tax deductible in most states & in a few states were not tax deductible at all last year because it didn't hold a high enough balance in Treasury securities consistently enough to qualify.

And my personal preference for most of my investing accounts is for all investments to be explicitly tracked including MMFs. That way I can see which MMFs I have money in when looking at my overall investing portfolio, rather than having different MMFs lumped together under a single "Cash" entry. The only exception is the CMA, where I don't want the account register cluttered up with frequent buy/sell transactions - in that account I'm fine with having the core position tracked as the cash balance as if it's a checking account. I know when looking at my overall portfolio that the "Cash" investment is SPAXX.

@Pacific_Shark_Chum Quicken may not be able to fix themselves if Fidelity is hiding the various MMF holdings & simply reporting to Quicken a single combined Cash value.