If you have access to SQL, it could be a simple query to SQL, using Execute SQL action, something like
SELECT DATEADD(QQ, DATEDIFF(QQ, 0, DATEADD(QQ, 1, @CurrentDate)),0). You would replace the CurrentDate parameter with the current date from the workflow.
I ended up using a calculated formula and it seems to be working. I wanted to default a date field on a form to it.