Actually there was a $0 in each field for my soc sec info and for my spouse. I was able to enter my total and taxable amounts but not my Medicare Part B deduction. The other fields for Medicare Parts C and D appear to be locked. My spouse's fields were all $0 filled. My workaround was to switch to forms view. Once I entered anything there, if I went back to step-by-step, I was able to change the value(s) if I needed to (i.e., no longer "locked").
Thanks.
