I am getting distributions from 457(b) plan and used Worksheet B to calculate excludable amount. Excludable amount corresponds to my contributions that were taxed in NJ. After two years of distributions, I rolled over a potion of 457(b) to an IRA. How to calculate excludable portion (contributions) on my remaining 457(b) funds? I need to allocate my total contributions between two plans: original 457(b) and new IRA. Thank you