If there's hundreds of stock sales and only 10 wash sales, you can't enter code "W", type in the wash sale amount without choosing a date ("Various" is not allowed) and entering code "M" and attaching the statement. If you leave off the dates, enter code "M", you can't enter the wash sale total. If you choose code "O" (in lieu of "M") you can enter the wash sale amount in the other adjustments column. So which is the preferred method? Entering the wash sale total in the adjustment and choosing code "O", and have the wrong code referenced on Form 8949? Entering a single arbitrary sales date for all securities, entering in the wash sale amount and entering codes "M" and "W"? Do I need to remove all the wash sales, report these one line at a time, then summarize the remainder and add an attachment? This problem impacts every single preparer and I can't believe ProSeries Support can't give me a straight answer on this question. I do not want to have to answer multiple, automated underreporter letters from the IRS after tax season because I'm doing it wrong! Thank you.