The retirement distribution is reported on Form 1099-R. The amount on Box1 1099-R is the gross distribution from your retirement plan. If line 16 of 1099-R was left blank, you needed to enter the amount from Box 2 which was the taxable amount of the distribution. You can go back to the form 1099. Instead, delete the amount you already entered and changed it to whatever amount on box 2 of 1099-R You do the same to the other 2 1099-R forms. The taxable amount on box 2 and line 16 (State Distribution) must be the same amount.
