Lacerte does what IRS does. $0.50 or less rounds down. More than that rounds up. 

Even TurboTax does it, so it must be right! https://ttlc.intuit.com/community/investments-and-rental-properties/discussion/i-have-put-income-wit...

Look at the tax tables. What are the increments there? How often do those expensive to make pennies ever impact the bottom line on a tax return. 

SHORT ANSWER - You can't make the program do what you want.