Illustration: A Shares owned by two taxpayers, and need to allocate 1/2 for each (50%)

Fill-up the "Less cost incurred", click the line "+" icon item and input the whole amount and do not forget  the 50% share in the "Use%"


Then, it will auto calculate the other percentage to the next owner.
 

FAQ: 

If the user does not create the worksheet using the "+" icon and instead enters the full amount directly, the system will not automatically divide or allocate the amount to the other owner. For example, if the total amount is $4,045.68, both owners will receive the same full amount instead of the correct split of $2,022.84 each