Foreign Income/DTA/Tax relief

I am self-employed and resident in Northern Ireland. I also do some freelance work in the Republic of Ireland. My Irish income is taxed at source. What is the correct way for me to include this income on my UK tax return? If I understand the situation correctly, there is a Double Taxation Agreement between Ireland the UK which means that I should not be taxed on this income twice. When declaring my total turnover in my tax return, do I include the money earned in Ireland? If so, do I declare the amount that has actually been paid to me (after tax), or the gross pay (before tax)? Or, do I include only my UK income in my total turnover, and declare my income from Ireland in the "foreign income" section? How do I then go about claiming tax relief on my Irish income in order to avoid paying tax on it twice? Thank you.

Hi
You will include the income within your self employment as turnover. you also show it at the foreign section as self employed and then claim foreign tax credit relief. All income must be declared in sterling.