Bert,
We are located in TN and have to deal with split rates. (TN sales & use tax has a local option rate that stops for purchases greater than $1600). JDE cannot handle the issue to my knowledge. The work around that we did was to create two tax areas in JDE, one for the full rate and one for the reduced rate.
On the standard voucher entry screen when we have a single article, we will enter the tax area with the reduced rate with a tax code of "U" for use tax on the first pay item. On the next pay item line, we enter the same tax area, but use a code of "UT" and enter the amount manually calculated for the local option with no other data. Not ideal, but best work around we could find.
Thanks,
KC