Filed 1040C (sole proprietorship) instead of K-1 (partnership)

Hello, 

Filed business income taxes through the tax software and did not realize (until I got the CP2000 notice) that it ended up being filed under "sole proprietorship" instead of a business "partnership" income. 

The income IRS says I under-reported is effectively the same as what I filed for. 

 

Is it easy to correct this myself or should I get a professional involved?