(Canadian

In Edit Security Details view for a selected security and if the Security Type is Mutual Fund, you have a selection "Use Average Cost" that you can check (or not).
For other Security Types: When you enter a Sell transaction and do not click on "Specify Lots", the default is FIFO (and has been for years, AFAIK, and unless someone changed that recently. Can't think of a good reason why, though)
From Quicken Help about selling securities ...
To extend ukr's comment, if you are wanting the default FIFO, when presented with the pop-up question about specifying lots, you only need to click the OK button. The FIFO default will be applied to the transaction. You do not need to enter into the form where the lots can be selected individually. (Perhaps interestingly, the pop-up only appears when accepting and processing downloaded transactions. It does not come into play for manually entered transactions.)
They also told us they were working on Investments (released for 2015), on some of the already released reports (for 2016), Loan Amortization(for 2017), and of course the redesign of reports overall (for possibly 2018?), just to name a few.
I've been using Quicken for 18 years, and that 'specify lots' dialog is a royal pain. I trade a lot, and most of my sells are not for the full position. So, the 'specify lots' modal pops up a lot! I just want to hit "Accept All" and have everything automatically FIFO. [removed]
This would especially create problems if you download your Quicken information into TurboTax.
I currently have 42 sold stock lots that I need to go into each one individually and specify the method which will always be the same (First In). It will take me upwards of an hour ...Bull. a) When you enter the transaction you have the option to specify lots and if you avoid that option, Quicken will default to your particular preference of FIFO. b) If you are not entering the transactions until they get downloaded from the brokerage, then only sales of partial holdings from a multi-lot holding will prompt you for the lot specification (selling the entire holding or selling a partial holding from a one lot holding will not present a pop-up lot question). For that pop-up situation because you are choosing the FIFO, all you need to dis click the OK. No need to click the specify lots button and go that path. "Upwards of an hour" is an over the top exaggeration unless there are other timing issues with your data file.
Following up on last comment in this thread that was merged in here.
How does one mark a post as an idea? Doesn't Quicken regularly watch what their customers are saying?