TAXK1 through 3 not populating into Sales Order

I am currently using CTX1, 2, and 3 for my Canada Tax Categories.

I enter my values on the customer master in XD02 of my Sold-To Party, however they do not copy into the Sales Order onto VBAK to my TAXK1, TAXK2, and TAXK3 fields.

The Sold-To Party Account # is setup as the Bill-To, Payer, and Ship to of itself.

I know it does copy from the SP because I setup Mexico to use MWST and it copies in the Tax Category Tax Classification Values standard into TAXK1.

My Plants are all maintained with CA values in "Define Plants" under Enterprise Structure, and CA is the only country that we have plants existing.

I know there have been previous posts on this issue, however it does not seem to have any answer across all the posts I've reviewed.

Anything I may be missing?