SA 100 required to declare foreign sale?

My oap plus other small income has not exceeded personal allowance for some years and I was informed by HMRC that s/e returns not required or expected. During 23/24 I sold my Spanish holiday home above a certain threshold, so understand that I must submit a SA100 to declare this..... As SA100 does not include mention of foreign C/Gain can I assume that by completing it and also selecting boxes 5&7 for SA108 and SA106(for FTCR) this will be the correct and complete way to proceed?

Hi zontes,
By selecting boxes 5 and 7, you are confirming that you have a foreign capital gains libility and paid foreign tax and that you will be completing the supplementary pages relating to them.
You can download and print off the supplementary pages SA106 (foreign) and SA108 (Capital gains) here:
Self Assessment tax return forms
Please note that paper tax return need to be submitted no later than 31 October to avoid late filing penalties and interest.
You can also phone the Self Assessment orderline at 0300 200 3610, to have the SA100, SA106 & SA108 posted to you.
If you need to register for Self Assessment, you can do this here:
Check how to register for Self Assessment
Thank you.