Tax code on the basis of Invoice Date in MIRO

Question

Hi Gurus!
Tax rate change from 12.5% to 15 % is due on 1st October in NZ._________________
Client requirement is that in MIRO transaction w.r.t. PO instead of the tax code being picked up from PO, the Tax code should be picked up depending upon the Invoice Date. _____________
For Eg. Tax rate changes from 12.5% to 15% on 1/Oct/2010,
Invoice Date = 20/Sep/2010, Posting Date = 20/Sep/2010, Tax Code = H1 (12.5%)
Invoice Date = 20/Sep/2010, Posting Date = 01/Oct/2010, Tax Code = H1 (12.5%)
Invoice Date = 01/Oct/2010, Posting Date = 01/Oct/2010, Tax Code = H3 (15%)
Is there a way this can be achieved?
Kind Regards,
Mehul

Answer 1

Hi Mehul,
We just had such situation in Canada.
It is recommended not to change the tax rate in the Tax code which is being used in open invoices because that could cause reporting and discount problems. And I am sure there will be open invoices with tax rates 12.5% come october 1. The solution is:
Create a new Tax code in transaction code FTXP with rate 15%( effective date Oct 1 and set the same GL Tax account) everything as old tax code except for 15%  which will used for POs initiated from Oct1 onwards. For PO's prior to Oct 1. just use the same tax code with 12.5%.
During MIRO the Tax code/rate  used in PO will be default,  you will have the option to go with old Tax code-12.5% or new tax code 15%.