I just installed the taxAndDiscount v0.1 plugin.
Now whenever you go to the delivery page, it gives the following error:
Fatal error: Call to undefined function: countbasketproducts() in c:\domains\expclan.be\wwwroot\mem\ant\actions_client\tax.php on line 33
Where is this countbasketproducts normally definded?
What version QC you running?
Firstly, you are using the wrong version of TAD! The 0.1 version is for QCv0.2.x only; you should be using TADv1.0!
Secondly, TADv1.0 has been broken by the renaming of a core function in QCv0.3.1 so that Admin back-end no longer works. TADv1.1 will be released shortly to correct the problem.