This is related to the existing "*Tax Reports* for diff. Countries" feature request (https://ask.getdelta.io/feature-requests/p/tax-reports-for-diff-countries).

It seems like when most crypto tax reporting is created it's done using the FIFO or LIFO methods, but some parts of the world (such as Canada) need to report capital gains using the ACB method.

So although tax reporting is not yet built into Delta, this is a preemptive feature request to add the ACB method after the initial tax reporting implementation is done.