• Firstly, the user will press 'Ctrl+J' key on the Purchase Bill window.

• A 'Switch Over' window will appear.

• The user will select 'Data Entry'.

• A 'Marg Erp 9+ Accounting' window will appear.

• The user will click on 'Challans'.

• A 'Sale' window will appear in which the user will select 'Challans'.

• A 'Challans' window will appear in which the user will select 'Modify'.

• A 'Modify' window will appear.

• The user will select options as per the requriement i.e, bill no.,bill date etc.

• A 'Sale Challan As On' window will appear.

• The user will select challan which needs to be modified and press 'F3' key on it.

After following the above steps, the user can Modify Sale Challan in Marg Software.