your statement is confusing. are you saying that 1) the sole proprietorship has an interest in a partnership and you need to enter the k-1 in your personal return? or 2) are you saying it's a partner in a partnership and you are the one responsible for filing the partnership return. if 1) it's really registered wrong since it's really you that owns it (a sole-proprietorship is disregarded for tax purposes). so the k-1 gets enter on your 1040 in a 1065 k-1 entry worksheet as if it was registered under your SSN rather than the EIN. there is no way to enter it on schedule C. or properly under any other form. if it's 2) then the return can not be done with this software. you would need Turbotax for Business which can run only on a Windows PC (not available online). if so, unless you filed an extension on or before 3/15/2020, it's late and penalties are about $200/per partner/per month late. if it is in fact 2) see a pro you have a lot to learn.
