In Marg ERP Software, the user can use the series wise Invoice type. But if the user needs to disable it then it can be done easily: 

In order to disable invoice type option, please follow the below steps:

• Go to Masters > Marg Setups > Control Room. Press Enter.

• A Control Room window will appear.

• The user will select ‘Search in All’. Press Enter.

• A Controls window will appear. Then user will Search 'Invoice Type'.

• Now click on ‘Accept’.

• An Invoice Type window will appear.

• In ‘Invoice Type Taxable/Retail required in Billing' option, the user will select 'N'.

• The user will now press Escape key twice .

• Then click on ‘Yes’ to Save changes.

After following the above steps, the invoice type option will get disabled from the series.