Use after split values for the shares you sold. If your 1099-B does not reflect post split values, and you entered the 1099-B as is, you will have to make adjustments on Form 8949 and Schedule D to reflect what happened post split. You are correct in that the gain/loss amount will not change as long as the amounts used are consistent; however, the post split amounts represent a more true reflection of what happened.
Using the same analysis, in the ISO Exercise and Hold section, you probably should also include the post split amounts.
@bcqa33
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
