A QCD is not taxable at all and does not touch the basis in the IRA if the entire distribution was a QCD. If only part of the distribution was a QCD and part was taken in cash then the basis will be pro-rated between the part taken in cash and the entire years end IRA value just as if only the cash part was distributed and that will be calculated on a new 8606.
If the entire distribution was a QCD then no new 8606 will be generated since the basis does not change.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
