I have the same question as the same situation applies to me. And to add, Turbo tax filled out an amount on line 18 in the NY column however is zero on the Federal column. How can I find out how Turbo Tax derived this amount? And could this be the line item that triggered NY to send the letter informing me to file IT-558? Hopefully we will get an answer right away as I have to file this form back to NY by May 11th. Thank you.
