issue #20476: wrote test
issue #20476: refining test
Merge remote-tracking branch 'XTUPLE/master' into 20476-taxass
Merge remote-tracking branch 'XTUPLE/dev-1-3-6' into 20476-taxass
issue #20476: added cache registration
issue #20476: got it working
Merge pull request #480 from shackbarth/20476-taxass

issue #20476: fixed tax assignment list