If you have a K-1 form from 2017 that was not included on your 2017 tax return, then you will need to file an amended return for 2017 to add the K-1 information. Below are steps for how to file an amended return for 2017:
https://ttlc.intuit.com/replies/6603004
If you have not filed a tax return yet for 2017, then see this FAQ for instructions how to proceed:
