When I try to enter the advance Child Tax Credit payments for both my spouse and myself, turbotax rounds up the both of our amounts which ends up being an extra dollar.

[bsaqr]

I'm not sure if this is a bug in the software but when I enter the amount in the "advance payment amount" box for each of us, it rounds up the $.5 to a full dollar which ends up being an extra dollar, then the following page they say make sure the amount is exact, otherwise it could be rejected by the IRS.

[MinhT1]

TurboTax applies the IRS rounding rules.

In this case, what you could do is enter the $.5 for one spouse and omit it for the other spouse, so that the total corresponds to the total of the 2 letters 6419.