I file an 1120S and generated the schedule K-1 earlier using turbo tax business but then I realized I made a few mistakes on the expenses. I didn't change any info on the schedule k1 and I have already printed the amended 1120 form. i'm just not sure where to mail it and what's all the forms the IRS need with it? also do NYS corporations need to file a state return as well or just federal? I am the only shareholder
