Every year until 2019 we are releasing the IRS values for the customers so they can upload them using procedure explained on How can I update my system with the new values of tables . Once we have information about new tables we will evaluate the solution we will provide on 2020. Please stay tunned to news side to be informed instead of creating incidents about this topic.
NOTE: IRS Table T5P1P is a customizing table where the Customers can update he/she the tables but they still use their own data. From SAP we will evaluate if on 2020 we will release again the tables (not confirmed yet) on this note but this is a help for the partners and they are the resposible to update this tables.