How to write off an invoice but capture taxes?

Good Afternoon, 

I couldn't find anything in the forums specifically about taxes so here goes.  

We are writing off some OE invoices, customer bankrupt and we will not see payment.  However, in the A/R Adjustment screens I don't see any tax option to capture the taxes that were originally charged on the invoice. 

How do I create a write off to capture taxes?

I found this link online with another related artical at the bottom. https://support.na.sage.com/selfservice/viewContent.do?externalId=19621&sliceId=1   

However, the link is dead and doesn't bring me to the article page.  

Any help is much appreciated!