by maths on Mon May 11, 2009 4:52 pm
Form 17 is, as you say, only applicable to husband/wife civil partners living together.
There is no requirement to infom HMRC of the split of rental income between father/daughter. The only info re the Tax Return is a simple declaration that you own property jointly.
Supply the split only when asked for it by HMRC (they may not in fact ask for it).