Software and Serials Entry is not integrated with Information Tab Purchase Date and Warranty Expiration.
The details on the the Software and Serial option has an Renewal date and purchase date, but you can not report on it.
I think that the information section should be copied to to Details section in Software and Serials.
Or alternatively to allow Change of purchase date or renewal date it gives a meesage asking if you want to update those dates on the information section so it
can be reported on.
I'm out of the office but I will personally look into it.