Tally just released statutory updated stat 91 to effect changed rates of TDS which has to be applicable w.e.f. 1st October 2009.
there are some also modification and changes in relation to vat/cst for certain states. readers are advised to download the same from the http://tallysolutions.com/newwebsite/html/index.html
For Gujarat state now facility to prepare cst E return is also provided
to know about detailed release notes please visit http://tallysolutions.com/newwebsite/Downloads/TallyPDFs/Release%20Notes%20for%20Stat900%20version%2091.pdf
Good source for learning tally.