No, you do not split the code 1B From 1099-R. It must be entered whole.
I think I have a workaround to get the code 1B Form 1099-R entered as a CRD. Enter the code 1B Form 1099-R as received, except omit the code B, select only code 1 (or edit your existing entry to remove the code B). Complete the entries, indicating that the distribution was a CRD and that you qualify. Finally, edit this Form 1099-R and add the code B. The CRD information will remain. If you need to change any of the CRD information, perhaps due to paying back a portion of this distribution before filing, you'll need to edit, removed the code B, make the changes, edit again and add back the code B.
