I'm not surprised that you haven't found much, because I think you're asking the wrong question. SQL Server is a general purpose RDBMS, so it understands how to store, retrieve and update data, while financial accounting and forecasting are fairly specific applications built on top of some data storage mechanism, with a lots of rules as to HOW to manipulate/track that info over time. You can certainly build all of those accounting/financial features into a system that uses SQL Server, but there isn't anything specific to SQL Server that would directly facilitate those features.

It's kind of like asking GM where the "self-drive to 123 main street in Newark NJ" button is on one of their cars. The car can certainly take your there - but you have to work to *make* the car get you there.