standard JDE process to reflect pst and gst calculations

Please can you let me know the following:

1. PO entry (P4310) you enter the Tax explanation code and tax rate area.

2. At voucher logging you enter the invoice details.

3. At voucher match, you have a base line with you PO amount and PST and GST is calculated based off the AAI setup for the gl account code and the tax amount based on P4008 tax setup.

please can you let me know if this is correct, as I do not have access as yet to do a quick test.

thanks

Malveena