Tax calculation seems off

Hello experts,

 

I have noticed that the tax calculation from turbo tax seems to be slightly off.  That is, I'm single filing for 2021 with a taxable income of $64,001; line 15 on 1040.  Using the tax smart worksheet the calulated tax is $9,472.  If I use the tax tables I get a tax due of $9,834.  If I calulate by hand, I get a tax of $9,828.72.  This is quite a bit different than what Turbo tax calculates of $9,472 (Line 16, 1040).  Anyone have a idea were my method for determining the tax is off by approximately $400?

 

Thanks in advance.

Dave