Transactions > Sales Order/ Invoice/Purchase Order/Bill > on The Line Item > Tax Code Column > Unable to Select a Valid Tax Code

On Setup > Accounting > Tax Code > Standard Rate (S-GB)  

Tax Code Settings to check on why a Tax Code is not appearing on Transactions

Effective From = blank

• Valid Until = blank

• Tax Agency and Tax Type are selected

• Purchase Tax Account = selected tax account (should not be Inactive)

• Sale Tax Account = selected tax account (should not be Inactive)

• Available On = Both

• Subsidiary = For OneWorld Accounts, the Tax Code should be available in the Subsidiary of the Customer/Vendor

On the sales transaction, the customer selected has a UK address and the item selected is assigned to a Tax Code/Tax Schedule with the Standard Tax Rate (S-GB).

On Transactions > Sales > Enter Sales Order > enter the customer and item > Tax Code = cannot select Standard Tax Rate.

On Transactions > Purchases/Vendors> Enter Purchase Order > enter the vendor and item > Tax Code = cannot select Standard Tax Rate.

This is likely to be caused by an inactive account used on the tax code. Go to Setup > Accounting > Chart of Accounts > check if the selected Purchase Tax Account and Sale Tax Account are both active accounts.