Hi,
An individual can claim the property allowance or expenses for one property and Rent a Room relief for another rental property. You would need to make seperate entries on a Self Assessment tax return for each source of property income.
Any tax due in respect of the Rent a Room Scheme would be calculated seperately as per the guidance.
Rent a Room Scheme (Self Assessment helpsheet HS223)
There are no seperate rules in respect of income received under the Homes for Ukraine scheme.
Thank you.