Investors & landlords

There really is no solution to your issue when multiple a/c's are involved.  Even professional software provides no aid in locating and reporting wash sales across multiple accounts. I've worked with various pro software but none were even able to import from a broker. Foreign brokers don't even issue 1099-B's. worse if you trade identical securities in any type of IRA or Solo 401(K) because there is usually no report to use.