Property sold owned jointly spouse died

I have sold a property which my husband and I owned jointly, he died in 2015, how do I calculate the Capital Gains Tax. The online form does not allow for this scenario

Hi,

You need to have the value at time of purchase and again in 2015, take 50% of each and add together. This is your purchase costs that you then deduct from the proceeds along with any costs and, or, improvements. This is then your gain.

Thank you.