In your situation brokers are required to accurately track your basis as all the stocks purchased and sold. This involves keeping track of wash sale losses and assigning those loses to the replacement stock. Accordingly, entering the 1099-B exactly as it reads should be all that you need to do to properly report your trades.
If you're in doubt about the accuracy of the resulting gain or loss associated with the 1099-B there's an easy test, given that you quit trading in September: Add up all your sales, add up all your purchases, completely ignore any wash sale activity. Subtract your total purchases from your total sales and that gain or loss should be what's reported.
