@book03 , generally the Box 16 ( State Distribution ) is filled in when and if any State Taxes were withheld at the time of distribution. If Turbo is not letting you get past then one option is to enter the Box 1 ( Distribution ) number if and only if Box 2 is blank Else enter the Box 2 ( the federal taxable amount ). While the federal withholding is mandatory, mostly the states do not demand withholding.
Is there more I can do for you ?