you got a SC k-1 that reports income and apparently also non-resident withholding. So a 2019 SC non-resident return was due 4/15/2020 (based on SC instructions for who must file and when for a non-resident).
Your Federal and PA returns need to be amended to reflect the K-1.
If you used the online free edition of TT, it doesn't support k-1's. you may need to get the deluxe desktop software (1 state is free) so you'll also have to buy aSC as a second state. you should contact support for your options. that may push a free copy of TT to your computer so you only need to purchase SC.
5am-5pm Pacific Time (8-8 Eastern) Monday - Friday
https://support.turbotax.intuit.com/contact
if this seems beyond your capabilities then you should consult a pro.
