Is there any way I can calculate annual share turnover?

A way of defining this is: the sum of the twelve monthly volumes divided by each month’s shares outstanding.

We do not have that exact calculation, but you can use the following Free Form Column as an alternative:

Volume (monthly) as a of Shares Outstanding * 12

It multiplies the monthly volume as a percentage of shares outstanding by 12.

Thank you for the quick response.

For "Volume (monthly) as a of Shares Outstanding", is that the average monthly volume over the past twelve months, or is it the volume over the past month, or is it something else?

The data definition says it is the "average monthly volume", but does not specify over which period. I have not used that variable in my screens before, and am not sure what period is used.