@Judithz what do you mean you first fill them out as Single? It would have to be as Married filing Separate, not Single. And are you using different account in the Online version or doing separate returns in the Desktop program? And then using a new 3rd account/return for the Joint return? Are you doing that just to compare?
To see the Social Security Benefits Calculation Worksheet in Turbo Tax Online version you would have to save your return with all the worksheets to your computer. Or if you are using the Desktop CD/Download Software you can switch to Forms Mode (click Forms in the upper right) and click on SS in the list on the left side.
