IRS First Time Homebuyer Credit website shows a balance left to pay that is $1 less from turbotax. Turbotax seems accurate - which amount should I use?

I am trying to pay off remaining first time homebuyer credit (year 2008) and IRS's https://sa.www4.irs.gov/irfof-fthb/ website shows a remaining balance that seems to be $1 less than what it should be (and from what Turbotax calculated).  Not sure which value I should use.