K1 related questions

I have 2 questions regarding K1.

  1. My investment is with a private company so I buy the investment via a private management company is always very late in providing the K1 form (september to october).  It's a long term investment that will take many years before I would see any gain or do any transaction.  May I file my tax without the K1 and amend it later?
  2. The same private management company charges me about 5-10% in fee each year, how do I record this fee so that it will be counted toward the cost basis when I sell my investment.  Would the K1 included these fee from the private management company?