Get your taxes done using TurboTax

I only did one at a time. I made sure to undo the first change before doing the 2nd.

 

When I subtracted 1k from my wages, 240 were deducted from what I owed in federal taxes. I then added 1k back to wages, which added back 240 to what I owed in federal taxes.

 

Next I removed 1k from my 1099 int (interest from a Bank CD I had). Turbotax deducted 278 from what I owed in federal taxes. Why did Turbotax tax deduct 278 vs 240? I am in the 24 pct tax bracket. Shouldn't income from interest be treated the same way as income from wages?

 

Thanks