NL Tax Return - social security

I have a resident permit for Netherlands (NL). I work, live and pay all my tax in the UK. I am in the Netherlands most weekends, and have place of residence in both countries. Under double tax treaty I am tax liable in UK. However, with the NL resident permit I need to submit an NL tax return. As part of completing the return I need to submit an S1 form or an S072 form. The HMRC website says I only need this if I work in NL, but my NL Tax Return asks for this, so I am unsure what to do. Could HMRC issue a certificate of coverage, or an S1 or S072 form for me even if I don't work in NL?

Hi 
We can issue a Certificate of Coverage and an S1 Certificate for healthcare would be included with this automatically.
If you go to Apply for healthcare cover in the EU, Iceland, Liechtenstein, Norway or Switzerland
Apply for healthcare cover in the EU, Iceland, Liechtenstein, Norway or Switzerland (CA8454)
And then click the link National Insurance if you work abroad it takes you to the application process.
Thank you.

 

So in applying for cover in the EU, I should say that I work abroad even if I don't work abroad in order to get the certificate of coverage and S1?

Hi,
Please also include your address abroad and provide a cover letter/additional notes explaining your circumstances any why you need the S1.
Alternatively, you will need to ask the Authorities in the Netherlands to submit a SO71 on your behalf, we will then issue out a SO72 .
Thank you.