One person LLC. Invested in start up company. Received schedule K-1 showing my initial investment with no profit/loss...Using TurboTax, where do I file/report this?

I believe you mean your LLC purchased an ownership share in a company and received a schedule K-1 in the name of and listing the federal ID number of the LLC. If so, you would report that on your personal tax return as if the K-1 schedule had been issued to you.