Hi Gary,
If your current EIN was filed under "Single-Member or disregarded entity" and you are "acting" like a partnership, you need to file a "Corrected EIN" form with the IRS. My CPA had to do this for me because I did the opposite. I filed for an EIN on my own as a partnership LLC, because this was my original intent, but ended up operating as a "Single-Member" LLC for the tax year. She filed for my corrected EIN as soon as it was caught the summer before filing. It takes a while for the IRS to correct the EIN and send you your new EIN number in the mail. I suggest filing for an extension to have this corrected so that you can file properly and avoid being audited.
If you file using the Partnership LLC Schedule K-1 IRS Form 1065, you and your partner should show your pro-rata income, credits and deduction here.
Check with your state requirements through a CPA just to verify what I said was correct. I am not a CPA or a tax professional but have learned a thing or two over the years. It is not wrong to meet up with a different qualified business CPA also, that is familiar with RE Investing, just to inquire.
Good luck and I hope this helps with your next step.
Jon