• Go to Masters > Marg Setups > Control Room.

• A 'Control Room' window will appear.

• The user will select ‘Search in all’.

• A 'Controls' window will appear in which the user will Search 'Post of Amount'.

• Now click on ‘Accept’.

• A 'Post of Amount' window will appear.

• In 'Post XX% of Amount in A/c .If Yes Type #7%' option, the user will mention '#7%'.

• The user will now press 'ESC' key twice.

• Now click on ‘Yes’ to save the changes.

• Now, Go to Reports > Management Reports > Utilities > Multi Editing > Multi Changes in Old Bill.

• A 'Multi Transfer' window will appear.

• The user will feed date range as per the requirement and select other options as per the requirement.

• Now the user will click on 'Accept'.

• Now the user can view all the bills created in the selected date range.

• Then select those bills whose rate needs to be deducted. 

Note: A single bill can be selected by space bar or plus (+) key on it & all can be selected by Asterisk (*) key.

• Then the user will press 'F6' key on it.

• The user will select 'Less Amount with %'.

• In 'Change Amount with %', the user will mention the percentage of the amount which would remain in the bill.

• Suppose there is a bill of Rs 100 and the user needs that after deduction the bill will remain of the Value Rs 90, So the user needs to mention 90% here.

• In 'Temporary/Permanent', the user will select either the changes need to be made permanently or temporarily.

• Suppose select 'Permanent'.

• Now the user needs to type 'Sure'.

After following the above steps the user can view Amount of Sale will get decreased in Multiple Bill in Marg Software.