For employee contribution, I know how much is my contribution from the gross income. Should I put this number ? Does it matter ? The "learn more" turbotax help box suggests that if the contribution is "after-tax" or a "portion of insurance premium", it should be included in this box. I don't know the exact calculations used by my employer in determining contribution amounts but there is a possibility that it might be pre-tax and not post-tax. I could check if it matters but would like to know more on whether it does before checking.
You can leave this blank. However, the taxable amount in 2a would equal the gross distribution (box 1) minus your after-tax contributions. (It doesn't sound like you have any here. Check with your employer.)
