TuMeke is currently optimized for industrial work where the subjects are performing material handling tasks. We have not tailored the product specifically for subjects in an office setting. You are welcome to experiment though and see if it works for your use case.
We typically see the RULA assessment used for analyzing seated postures such as sitting at a desk. The RULA is a rapid upper limb assessment. The Revised Strain Index (aka Handstrain in TuMeke) can also show the different levels of risk as it relates to the hands, wrists, and forearms.