Hello bmariko,
Thank you for joining us in the Ask the Experts event. As to your question, the best thing to do in this situation is to file your return without the K-1 and then file an amendment after you receive the K-1.
If, however, you know you are going to be getting a refund then there should not be any penalty or interest (at least for federal, not sure about your state) for filing late because those are based on any tax due. That is a little risky, but another option to consider if you don't want to amend. Amending is free if you use TurboTax, so don't let cost be a factor.
I hope that helps.
