I can apportion my MA income using the apportionment method by days. The income on my W-2 form shows it all under MA. How can I apportion my income on TurboTax?

I can apportion my MA income using the apportionment method by days. However, all of my income on my W-2 form shows it all as MA income.  How can I apportion my income using TurboTax?