In order to ban user to modify Today's Bills Tomorrow in Marg Software, the user needs to follow the below steps:

• Firstly, Go to Masters > Passwords & Powers > Operator's.

• A 'Password & Authority' window will appear.

• Select the user to make the desired changes. Press 'Enter'.

• A 'Powers' window will appear in which the user will select ‘Search In All’.

• A 'Powers' window will appear in which the user will search 'Modification' .

• Click on ‘Accept’.

•  A 'Modification' window will appear.

• In 'All Accounting & Billing Modification Allowed Upto' option, the user will mention '1' and select 'Days' from the drop down.

•  The user will now press 'ESC' key.

• Again press 'ESC' key and then click on ‘Yes’ to save the changes.

• A 'Powers Change' POP-UP will appear in which the user will press 'ESC' key.

• Again press 'ESC' key and then click on ‘Yes’.

• Now in order to Re- login, the user will press 'Ctrl + U' on the main screen of the software. 

• A 'Change User' window will appear in which the user will enter the User ID and Password.

• A 'Change User' window will appear in which the user will press 'ESC' Key.

After following the above steps, the user will not be able to modify today's bills tomorrow.