Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
You should register with HMRC as self employed, probably when you have received your first remuneration. That Department will then send you a self assessment tax return to complete at the conclusion of each tax year.
If you were on ships for over a year then you are entitled to Seafarer's Allowance and are not liable to UK taxation. HMRC are most unlikely to make inquiries as to your circumstances. Recent austerity has greatly reduced their ability and enthusiasm for fishing expeditions.
I do hope that you have found my reply of assistance.
No, you should merely register for self employment with HMRC. The only reason I mentioned remuneration was because there is little point in registering before you had some income!
You should consult HMRC regarding your entitlement to Seafarer's Allowance, a highly complex subject especially as you appear to have been employed on an overseas registered ship. The relevant contact details can be found here:
There is no point in my opinion in registering for self employment until you receive your first remittance. When you make your return and if your income proves to be relatively low HMRC may well tell you that you need not self assess in future.
The notes provided with your tax return are pretty comprehensive. In the meantime you should maintain proper books of account to record income and expenditure.
If you have no income then there is no IT or NI to pay. Council Tax for the living accommodation you occupy is, of course, quite another matter. You should be reminded of any shortfall in NI contributions annually. Remember you need 35 years of having your card stamped, to use an old expression, to obtain full state benefits at retirement age.
You are indeed of the radar, but I would gently point out that until you start earning from self employment that is perfectly correct.
Here is the HMRC link for registering:
They will send you a self assessment tax return to complete at the end of each tax year [5 April].
Authorship seems an appropriate self employment to take in your circumstances.
No, you would declare your being self employment yourself.
If your web site pays you income then it would be part of your self employment.
You could form a limited company, but that would be a bit of a palaver running it and probably not worth the effort.
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