Hi,
Please have a look at helpsheet HS380 for completing partnership tax returns for non resident partners.
Completing Partnership Tax Returns for partners non-residence in, or domicile outside, the UK (Self Assessment helpsheet HS380)
If all the partners are non resident they will still need to complete a return if there are any profits arising/derived in the UK. We often send SA768 for confirmation and they need to be able to say yes to every question before we can agree that they don't need to complete returns. Please see:
PM287000 - UK registered partnership with no UK source income or gain
You have suggested there is no trading/base of operations in the UK and in that case we wont you to do returns.
If you have any UK sources of income, offices etc then you will need to complete partnership returns as normal.
PM284000 - Where are the profits earned?
If they need to complete them Partnership returns cant be done online unless they have commercial software.
File your Self Assessment tax return online
If they don't, you will need to submit paper returns. If necessary you can go to link below to download them.
Self Assessment: Partnership Tax Return (SA800)
Re the years you weren't registered, again it will depend on whether you traded in the uk etc and if any profits were derived in the uk and profits shared then it would need to be declared. You might be better contacting our Self Assessment team directly so we can discuss and look at the actual partnership record.
Self Assessment: general enquiries
Thank you.