CGT when buying out joint owner

I bought a property jointly owning 50% in 2005, then bought out the other 50% share in 2012, whilst still living there up to that point. I then moved out and let the property, until selling it recently. How do I report that online. Should I make 2 different entries for each 50% share, since the purchase dates were at different times? The online process doesn't offer me the option to say I purchased shares of the property on different dates.

Hi
No, you will just show the one and owning 100% of it.
Your cost price will be the price for the 50% you originally paid and then the price for the other 50% in 2012.

The problem is that the online form doesn't allow me to enter this split, so what should I do?

should I just be summing to the 2 amounts?

Hi muki1,
You will show that you own 100% of the property and your cost/purchase price will be the amount you paid when you first bought the property and also the amount you paid to buy out the other owner.
Thank you.