If you need to prepare a business tax return for your business because it can't be entered on your personal tax return on a Schedule C, you will need to buy, download and install on your personal computer the TurboTax Business product: https://turbotax.intuit.com/small-business-taxes/
If you have already filed your personal tax return without the K-1 generated by your business return, you will have to prepare, print and mail an amended personal return form 1040X to add the K-1 information. DO NOT amend your return until you have received the refund from your original return.