Confused why HMRC suddenly wants a tax return after 10 years

This is rather odd. I left the UK in 2004 when I married my US hubby, and haven't lived there since. In fact, I haven't set foot in the UK since 2007. I have no property or even a bank account in the UK - just my NHS pension and a small Standard Life pension (and yes, I submit my FBAR every year lol).

Today, I've received a 2014 Tax Return from HMRC. First time I've heard a peep from them in 10 years. Has a 'tax reference #' instead of my National Insurance#, and has my name wrong (incorrect middle intitial).

I've battled through their website and as best I can tell I'm not considered domiciled (certainly am not resident). Certainly I will be attempting to call them to find out what I'm supposed to do, as I have no UK income of any kind and I can't imagine I have to report my US income as I don't meet the residency/domicile test.

Interestingly, we applied about 2 weeks ago for a UK immigration visa for my husband as we hope (if all the stars align) to return to the UK later this summer. Perhaps this is what triggered it - but if so then they'd see from my application that I have been gone a looooooong time, have no assets there - and they'd have my name correct!

Anyone else encountered this? And, anyone have a clue what might have triggered this for me after 10 years (and with my name incorrect to boot?!).

Also curious why the return address on their envelope is Schiedam, The Netherlands?!

Updating to add:

Just spent a very frustrating 30 mins talking to HRMC, who decline to assist me because a) they have my name wrong and b)apparently the date of birth they have on file for me does not match their records. So, as I am unable to pass their telephone security questions, they can't assist.

The most frustrating part was the man insisting I tell them what my middle initial of 'W' stands for, even though I told them I've never had a middle initial of 'W' and so I can't tell them what it stands for. Around and around.....  "Well, i can't assist you until you answer that question".
 

UGH!!

Here goes writing a letter to them which they estimate will take them 5 weeks to respond to 

All seems rather strange.
Could be that they have you mixed up with someone else, what with middle initial and DOB being wrong, and it is a pain with DPA regulations - working in a call centre it's frustrating that you have to ask and you know they can't anser. I had someone asking why the company had tried to take a very large direct debit amount from his bank account, I found them attached to another account but could not give any details other than to say I would remove the bank details!
I did a search on HMRC and a Netherlands address and couldn't find anything - was that a reply address or an address if undelivered? If the latter it could just be down to the company they use to do their mailing.

This is my opinion only, but I certainly would not mail any information for HMRC to an address in The Netherlands.

I'm surprised at the response from your phone call, but I would look on the HMRC site for any numbers to report either a scam or fraud. You may have a better response.

I would agree with the possibility of the HMRC confusing you with someone else. 

After my mother died, I got a letter from a lawyer for "Ann M Smith."  My late mother was "Ann A Smith."  It was concerning property taxes in a Texas county I never knew her to visit.  I immediately contacted the executor of the estate (one of my brothers) about it.  He said that some lawyers make their livings doing this, desperately hoping someone will pay up.  He called the lawyer, and explained that it was not our mother he wanted paying up.  The matter was resolved, and nothing more has been heard or said of it.  Good luck to you.

DH got something a long while back from Department for Work & Pensions (DWP) that was sent from a non-UK address, but it was just some informational mailing, with no reply required/requested.

I've just received my annual "notice to complete a tax return" from HMRC.

The address on the back was in Glasgow; the front top left corner says "HM Revenue & Customs, Private, ENV 275 NDU". I wonder if that's just an indicator of the mailing type, rather than a return address. Nothing comes up on Google anyway.

All correspondence I've received has a "Tax Reference" number; nothing has used my NI number. If you ever filed a return, you should have been issued a Unique Taxpayer Reference number (UTR). After years outside of the UK, DH had no idea what his was, but HMRC still had it on file when we inquired in 2011 after we moved back.

The pension income may have prompted a notice to complete a self-assessment, but it's equally likely that your record is mixed up with someone else. I would go through whatever steps you need to request a copy of your records, including the UTR....but not via an address in The Netherlands.