Tax condition set to check if Line Account start or contains a string value?

Summary:

We have a requirement to default a specific tax rate code if PRODUCT segment on the invoice distribution line starts with a certain prefix (for e.g. if PRODUCT segment = 'ESHC0001', then tax rule should work).

Our Product segment consists of 4 alphabets and a numeric code, and is not sequential in nature. I already tried below variations in defining a tax condition set, and none of them seem to work.

• PRODUCT Contains ESHC
• PRODUCT Starts with ESHC
• PRODUCT Contains 'ESHC'
• PRODUCT Starts with 'ESHC'
• PRODUCT Contains "ESHC"
• PRODUCT Starts with "ESHC"

Since the value set values for Product are not sequential, we cannot try operators like 'between' or 'greater then' also.