Thank you for your patience
As you are receiving rental income you need to registerfor self-assessment to enable you to file a tax return unless you are alreadyregistered and file your tax return.
You will report your rental income by completing supplementary pages SA105 – UK Property when you file your tax return.
Registering is a relatively straight forward process and more information on this can be found here
Your tax will be calculated when you file the tax return and payment of it is due no later than 31 Jan following the end of tax year you are reporting, e.g. for tax year ending 5 Apr 2017 you have to file your tax return by 31 Oct 2017 if filing a paper return or 31 Jan 2018 if filing online.
All tax due for tax year ending 5 Apr 2017 has to be paid by 31 Jan 2018.
More information on paying your self-assessment tax bill is covered here
I have attached tax calculations for your perusal.
I hope this is helpful and answers your question.
If you have any other questions, please ask me beforeyourate my service – I’ll be happy to respond.