Reader question: Tax already paid but still a reminder

In your case I would telephone the tax authorities (abroad) and indicate that if necessary you could scan the proof of assessment and the amount already paid and send this via e-mail.
You will then be assigned a one-off e-mail address limited to this incident, where you can send the evidence.
But maybe a phone call with the relevant service is enough.

Could be Adrian. Nowadays you only see companies communicating through their own website.
So is the tax office. You will receive an email with a reference to your account in “my government” or “My Tax Authorities”.
Direct emails with the content will no longer be sent to your mailbox.
Assuming that Hans also arranges matters through “my government”, “my tax authorities”.

Have a good look.
It's from the Central Administration Processes.
Attribute FHR 21 and then my social security number.
Also in the well-known blue envelope
Address here in Thailand.
Maybe someone is familiar with the feature
Hans van Mourik

I would call the IRS...

if, if, if… independently of these papers sent, find the address of the so-called sender (and your contact address may be known to the NLe Belastingdienst) and send them a scan of this paper.
Should another official somewhere “have done something other than your idea of ​​justice”, you have proof of advertising.

Hans van Mourik, there is no sanction in the letter and you have submitted both the declaration and the final assessment. I would frame the letter as a rarity and not worry about it. If something like this comes up, call the tax telephone, then there is still plenty of time.