Message type: E = Error
Message class:  CA_TTE - TTE Messages 
Message number: 441
Message text: Maintain deductibility reason
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
In Customizing for TTE,
Choose <DS:SIMG.TTEVCL_TXSET>Define Tax Settings</>
Choose the sub-activity: <ZK>Define Tax Type.</>
Select the relevent tax type.
Choose <ZK>Define Deductibility Reason.</>
Maintain the deductibility reason for the relevant tax type.
Choose <ZK>Save</>.
To update Customizing settings, choose <DS:SIMG.SIMG_REFRESH>Immediate
Customizing Refresh</>.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CA_TTE441, which states "Maintain deductibility reason," typically occurs in the context of tax determination or tax calculation processes within SAP. This error indicates that a required field for the deductibility reason has not been maintained in the system, which is necessary for the proper processing of tax-related transactions.
Cause: Missing Deductibility Reason: The primary cause of this error is that the deductibility reason has not been defined for the relevant tax code or transaction type in the system.
Configuration Issues: There may be issues in the configuration settings related to tax codes, tax categories, or the specific transaction that requires a deductibility reason. Data Entry Errors: Users may have failed to enter the required information in the relevant fields during transaction processing.
Solution: Maintain Deductibility Reason: Navigate to the relevant configuration settings in SAP. Go to the transaction code OBYZ (for maintaining tax codes) or SPRO (for configuration). Find the section related to tax settings
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CA_TTE440 Maintain legal text ID description
What causes this issue?  The system issues an error message and will not allow you to continue with this transaction until the error is resolved. Syst...
CA_TTE439 Assign quantity-based condition type to tax type &2, country &1
What causes this issue?  The system issues an error message and will not allow you to continue with this transaction until the error is resolved. Syst...
CA_TTE442 Maintain posting indicator
 <ZK>&CAUSE&</> The system issues an error message and will not allow you to continue with this transaction until the error is res...
CA_TTE443 Maintain business partner tax classification for &1
What causes this issue?  The system issues an error message and will not allow you to continue with this transaction until the error is resolved. Syst...
Click on this link to search all SAP messages.