You can amend your taxes with TurboTax if you have already filed. If you have not filed you simply need to use the amended form to fill out your taxes.
If you have filed and would like some information on how to amend here are some steps for the process.
https://ttlc.intuit.com/questions/3061514-how-do-i-amend-a-2016-return-in-turbotax
