2773275 - How to set field "Tax Code" as optional when creating supplier down payment requests?

When creating supplier down payment requests in app "Manage Supplier Down Payment Requests", the field 'Tax Code' is mandatory.

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SAP S/4HANA Cloud Public Edition 

1. Open app "Manage Supplier Down Payment Requests"
2. Click button 'Create'
3. Field 'Tax Code' is set as mandatory

The corresponding reconciliation account is not set with posting without tax allowed.

In app Manage G/L Account Master Data, set the corresponding reconciliation account with 'Posting Without Tax Allowed' selected as below:

Tax Code, Reconciliation Account, Posting Without Tax Allowed, Mandatory, Manage G/L Account Master Data, F1688, Optional , KBA , FI-FIO-AP-2CL , Fiori UI for Accounts Payable (Public Cloud) , FI-FIO-AP-TRA-2CL , Transaction Apps: Public Cloud , FI-GL-GL-F-2CL , Value Added Tax (VAT) (Public Cloud) , How To

SAP S/4HANA Cloud Public Edition all versions ; SAP S/4HANA Cloud all versions