A helpful feature, which seems to have been raised previously but not implemented, is tax lot selection for transfers. I understand that it currently follows the cost basis method chosen, however, it would be helpful to implement custom tax lot selections for transfers. A potential way to implement would be to offer a table within the "ledger" view when you click into a transaction that displays available tax lots, which can then be sorted by cost basis.
In many cases, assets remaining on exchanges are intended to be sold with optimal tax treatment (HIFO) and assets transferred to cold storage are lowest cost basis lots. Having the ability to select would be extremely helpful for managing tax optimization strategies directly in your application. The default can remain in line with the cost basis method selected but I think many users would find the additional customizability to be valuable. If monetization of the platform is a factor then maybe it can be considered as a paid feature. I have many clients that I would