Clearing firm (name began with a P, now begins with an A) won't adjust cost basis of covered shares to account for wash sales of non-covered shares. I've been trying to get my 1099-B corrected since April, and was just ultimately told by my broker that the clearing firm (used to being with a P, but now beings with an A) is unable to adjust the basis of covered shares to account for wash sales of non-covered shares. I'm told I may have to utililize form 8949 to report the basis of what I "feel is correct." To me this is just laziness on the clearing agent's part. After all, they do have a record of all my past trades, but say they are unable to adjust the cost basis of covered shares to account for wash sales of non-covered shares. Do I really have to adjust every incorrect covered trade on 8949?.... or could I do one of the following instead? : 1) Just NOT take the last NON-covered wash sale(s) on Box B of 8949 (instead of adjusting all the Box A covered trades) and hope nobody notices that I didn't take those wash sale(s) (and why should I have to, if the clearing firm didn't adjust the covered trade basis as a result of those wash sale(s)?) or 2) DO take the last non-covered wash sale(s) but include a special "error adjustment" afterward, along with a "see explanation" and then provide an explanation indicating that the 1099-B issuer failed to adjust the cost basis of covered shares to non-covered shares, and therefore I am making a single adjustment for the "lost wash sale adjustments" rather than adjust every Box A trade. The point of going with either 1) or 2) instead of adjusting the basis of all the covered trades, would be to avoid red flags. Let me know what you think. Thanks, J.