Form 11. Where do you show RCT that was deducted already.

Trying to help someone with their (last minute I know) return. RCT tax was withheld but doesn't show on the IT assessment. I've populated the
"(h) Amount of tax, including Preliminary Tax, paid directly to the Collector General for this period" with the withheld tax but when I save and continue it still shows the higher amount of tax payable (i.e. not reducing the liability) when they go to sign and submit.
Anybody know what to do? TIA

You don't include RCT on the form. Once the form is filed, revenue will offset the RCT they have on file against what you owe.