Symptom
Unable to create Tax Code for the Country which is not enabled as Tax Basic Region. This is because you wanted to add the Tax Code for certain country while creating the Supplier Invoice.
Environment
SAP Business By Design.
Reproducing the Issue
1) Go to the Business Configuration Work center.
2) Go to the Overview sub view.
3) Search for *Tax on Goods and Services* activity.
4) Click 'Define Tax Codes' and give Add Row Button.
5) In Country/Region field, try to add your preferred Country.
6) In Tax Event there is no option to choose from (It shows No items found).
Cause
This is due that SAP haven't enabled certain countries as a Tax basic region.
Resolution
For the Country you've tried to add the the Tax Code is currently not enabled as Tax Basic Region and that this should be customized/addressed through SAP Cloud Applications Studio.
These below documents should help you to achieve the Tax codes enablement for certain countries.
Using the Localization Toolkit (SAP Business By Design) [https://help.sap.com/docs/SAP_CLOUD_APPLICATIONS_STUDIO/549c75135a7e44859a53cdf191e0db54/73afdfd273e21014a11be3e82db01de6.html]
Localization [ https://help.sap.com/docs/SAP_BUSINESS_BYDESIGN/85d74374ac314856a5de4c5e17dd73d9/dca9832505404ab9949106b4e6ed742f.html?q=localization ]
SAP ByD: Localization Toolkit and Language Adaptation Tool services. Set new subsidiaries anywhere in the world. [ https://blogs.sap.com/2017/02/10/sap-byd-localization-toolkit-and-language-adaptation-tool-services.-set-new-subsidiaries-anywhere-in-the-world./ ]
Keywords
Tax Code, Tax basic region, Supplier Invoice, SAP Cloud Applications Studio. , KBA , AP-ACC , Business ByDesign: Financial Accounting , Problem