iso exercised sale reported on 1099B need code

[peekz]

i have a ISO exercised and reported on w-2 and 1099B. When i adjust the basis to reflect the w-2 element, i need to enter a code "B"? But that then adds to my clients total income making it double count the capital gain, so what code do i enter for the adjustment without show essentially another $15000 in income?

[Just-Lisa-Now-]

Im not following how adjusting the basis is doubling the gain.

If you double click on the sales entry line, it opens another window that you can input the correct basis and get a Code B to appear on the line.