Renting income from overseas property

My son have a flat rented from Nov 23 and we stayed in UK 12 Sept. My son is a student and I know I should fill in the form of SA100 and SA106. The flat has rented since Nov 23. The amount of money should be added from Nov 23 to 5 April by proportion and also I added the other expenses such as rates, management fee, insurance and then fill the net profit. Is it correct? Do I did to fill the split year form. If I should fill can I only fill SA109 and the other form submitted by online. Thx

Hi Lucinda,
You record the income from property that you received from 01/11/2023 to 05/04/2024.  
Any expenses that occurred during the rental months can also be included as a deduction.  
To send a tax return into us online with an SA109 you will need to use third party software or you can send in a paper form with all of the necessary supplementary pages.
Guidance on income from property expenses cab be found here:
PIM2068 - Deductions: main types of expense: contents
Thank you.