I have a llc and operate it from my home. I own the home

Should I claim a % of my mortage+taxes+utilies? If so where should I report it?
Or claim it under rent?

Yes, you can deduct proportional mortgage, taxes and utilities for business use of your home. There is another requirement if you claim home office expenses. You must also claim depreciation for that portion.

For home office you must have room or portion exclusively for the business use.

If you are a sole proprietor, claim on schedule C or C-EZ (Form 1040).

No it is a 2 member LLC filing a separate return. So where do I claim this?

Two member LLC is a partnership unless you elected to treat it as a corporation. Partnership will issue you K-1 (Form 1065) showing your share of income. Report the income on your tax return on schedule E (Form 1040).
Hope you have already file LLC partnership tax return Form 1065.
Your U.S. Tax Return: Partnerships (http://taxipay.blogspot.com/2008/09/partnerships.html)

Yes I have... So I report the k1 in schedule c and then take the home office deduction there is it?

You will report partnership share on schedule E (Form 1040) part II. This income is subject to SE tax after you reduce the amount by any allowable expenses attributable to that income. You should read instructions to line 27 of schedule E.