Generate a report showing balances held on each wallets separately.
For users to comply with common new tax reporting requirements (Spain, UK, France etc..) where assets held on foreign exchanges must be declared individually in a separate form.
Workaround
While it's not yet possible directly, you can calculate your balances on a specific date using the Ledger reports or even look at the ledger changes for each coin in each wallet on Koinly website.