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Netherlands

aanslagfix.nl

A tax assessment that turns out higher than expected, reviewed and challenged if necessary.

ReachNetherlands
AdministratorThe Iron Giant
StatusLive

To aanslagfix.nl →

An income tax assessment that doesn't match what you reported, motor vehicle tax on a vehicle that's off the road, or a municipal levy for a connection you don't have. Tax assessments are mass-produced and there's a margin for error — but it only gets noticed if someone reviews it, and the letter doesn't encourage you to do so.

We review for free whether there are grounds for an objection and prepare the letter of objection. For local levies this goes to the municipality or partnership, for national taxes to the Tax Administration; the correct address is in the instructions you'll receive.

What it does

Comparing the assessment against your details

What appears on the assessment, and where it differs from what you reported yourself or what is actually correct.

The chances check

For each type of assessment, the grounds that work in practice, and a fair assessment if none apply.

The objection letter

With the correct reference to the assessment notice and the case number, so there's no doubt about which decision you're contesting.

For whom

  • Individuals with an assessment that differs from their tax return
  • Vehicle owners with motor vehicle tax on a vehicle that's been suspended or sold
  • Residents with a local levy that doesn't match their situation

Where it is found

Strongly seasonal: 'objection to income tax assessment', 'motor vehicle tax objection suspended car', 'assessment incorrect'. Peak season is summer and autumn.

Frequently asked questions

Do I have to pay the assessment while my objection is pending?

In principle yes, unless you request a payment extension. That's a separate request to the same authority; the instructions will show where to send it.

How long can the Tax Administration take?

There is a decision period, and it can be extended under certain conditions. We monitor it and notify you if it expires.

How this platform is built

Like every Theos Group platform: on one shared foundation, in its own management, with its own automatic administrator — here The Iron Giant — who runs the daily rounds, reports incidents and writes the daily report. What we learn from one system is deployed across all others the following week.

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