Is this Form 1099-R reporting the rollover from the 401(k) to the IRA, or is this Form 1099-R reporting a distribution from the IRA?
Is the IRA/SEP/SIMPLE box marked on this Form 1099-R?
Is any amount shown in box 5 of this Form 1099-R?
The after-tax amount of your contributions to the plan is a fixed dollar amount. 6.01% of your contributions being after tax contributions does not make 6.01% of your distribution nontaxable (unless you meant to say that 6.01% of the amount distributed equals the amount of after-tax contributions to the plan). The earnings attributable to the after-tax portion are taxable, so it could be that more or (more likely) less than 6.01% of your distribution is nontaxable, depending on investment performance in the plan.
If this is reporting the distribution from the 401(k), at least 20% of the taxable amount would have to have been withheld for taxes. Did you make up that portion with other funds so as to complete the rollover of the entire gross amount of the distribution?
