What does "Did you allocate your income to New York based on the volume of business transacted" mean? I entered rental income for NYC but I live in another state.

In your case, the answer to that question would be no. 

If you are engaged in business activities both inside and outside of New York, you can determine the percentage of business transacted in New York and use that to get your state tax due. 

For you, 100% of the NYC rental income is New York income, so the question does not apply. 

Hello,

Regarding the new york state addon for turbotax business, does the software import the data from the federal forms and perform all necessary calculations, or do we have to fill in the new york state forms manually for S or C Corp?

Does the New York state addon perform any type of calculation checking on the state forms or is it just a straight data copy from the federal data?

Also, does the software calculate the prior net operating loss deduction using forms 3.3 and 3.4 or do we

have to do that manually and enter the data?

Does turbotax business have any online guides on how to fill out the new york state forms and do the prior net operating loss deduction using forms 3.3 and 3.4?

Thanks in advance.