The new tax law almost doubled the amount of the Standard Deduction. It's believed that MANY more taxpayers will now not need to itemize their deductions because of the changes. This "may" be the issue you're seeing in your return. See the information below for more explanation.
https://ttlc.intuit.com/replies/4767939
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
