The partnership will need to file a -0- Form 1065 if it had no business transactions at all for the filing year.
In regards to changing your LLC "P" to an LLC "C" this is not something that the Turbo Tax program can process. However, you may want to take a look at Form 8832 Change of Entity form, but because of the complexity of this issue we recommend that you contact your CPA or attorney to get assistance with this transition. Click here for Change of Entity Form 8832. Please note that there will likely be additional State Filings required for this type of entity change.
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If you are not a U.S. Citizen or resident alien with a green card, you can not use any version of TurboTax to file your tax return. You will need to seek professional help, as you are required to use IRS Form 1040-NR which TurboTax does not provide or support.