redherring: Got a bill for $375 because:
1. IRD included an extra pay period (from this year) in their assessment.
2. That pushed my total income into a new tax bracket so I haven’t paid enough tax.
3. They’ve now overpaid my Working for Families because with a higher income I’m not entitled to as much.
Great work by the new system.
It seems the new system works only if you have an extremely simple tax situation - like PAYE and nothing else. If you also have interest and dividends it can’t handle it - particularly if those are in joint names.