Hello I need to file late self employment taxes for 2015 and self employment taxes for 2016. how can I get started in filing the late return?

[VolvoGirl]

Did you already file a 2015 return?  Then you need to amend it to add to it.  How to Amend     https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed

If you need to file an original 2015 return,  Online is only for the current year so you have to buy the Desktop CD/Download program here https://turbotax.intuit.com/personal-taxes/past-years-products/  

Or you can get the blank forms from the IRS and do them by hand.  Either way you will have to print and mail prior year returns.

[wessssyoung]

If I buy the software does that mean I can use it to do both tax years for the cost of the software? What happens t the software in 2017 tax year? Do I have to buy it again?

[VolvoGirl]

Sorry no.  You have to buy each year separately.  It is only good for 1 tax year.  
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[wessssyoung]

I have a business I sold for installment payments in 2015 sole proprietor. no other income besides I am also a partner in a small LLC which I didnt really profit from and have a schedule K1 from that partnership. do I need the most expensive version just to enter that form? If not what version will I need?