Message type: E = Error
Message class:  /PRA/P2_TAX -  
Message number: 015
Message text: Effective From Date &1 must be First Date of Month
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The SAP error message /PRA/P2_TAX015 Effective From Date &1 must be First Date of Month typically occurs in the context of tax-related configurations or entries in the SAP system, particularly when dealing with tax rates or tax codes. This error indicates that the "Effective From Date" you are trying to enter does not correspond to the first day of a month, which is a requirement for certain tax-related entries in SAP.
Cause: Date Format: The date you entered does not fall on the first day of the month (e.g., 2023-10-15 instead of 2023-10-01). Business Rules: The system may have business rules that require tax rates or codes to be effective only from the first day of a month to ensure proper tax calculations and reporting. Configuration Settings: The configuration settings in the SAP system may enforce this rule for tax-related entries.
Solution: Change the Effective From Date: Modify the "Effective From Date" to the first day
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