I have multiple IRA accounts, Traditional, Rollovers, Roths (with conversions), 401ks, etc. over many years.
One of my rollovers was from a 401k that includes after tax contributions.
As an example, assume I have the following:
Traditional: 10k contributions, 15k end 2018 value (after 4k distribution)
Rollover 1: 10k value at time of rollover (100% pre-tax in 401k), 14k end 2018 value
Rollover 2: 12k value at time of rollover (10k pre-tax, 2k after tax), 16k end 2018 value
Roth: 10k contributions, 18k end 2018 value
In 2018 had distribution of 4k out of Traditional (towards son's college tuition).
How do I determine my basis, for reporting against the distribution I took?
