Expense Entry Error When Trying To Save (Related To Taxes)

Expense Entry Error When Trying To Save (Related To Taxes)

Hey folks,

I've been trying to enter my first few expense entries in Zoho Books and I'm faced with the following error. 

"You cannot perform tax related operations when you are not registered for tax."

But I have my HST/GST enabled and the tax rates are set up. 
I also doubled checked my Tax Registration number to make sure its right. 

Why is this happening? 

I want to input my purchases and properly document the taxes that I paid so I can run a HST/GST Return report. 

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