I am trying to create a sales invoice with reverse charge mechanism (RCM) in BUSY but the RCM tax is not getting calculated automatically. How can I resolve this?

In BUSY if you wants to record sale transaction as rcm then sale type for rcm should be created and when you select sale type as rcm,it doesnot calculate tax in sale voucher and is only to show transaction as rcm ,follow these steps to record sale invoice under rcm
 Step 1 Open your company 
 Step 2 Go to transactions
 Step 3 Then select sale voucher and proceed to add
 Step 4 Now select series,date voucher number ect.
 Step 5 While adding sale voucher,in sale type you have to select sale type as RCM or you can create by clicking F3 in sale type and then add name as rcm and select specify sales account and then taxation type as reverse charge and region local or central and save the sale type
 Step 6 Now after selecting sale type,proceed to add party,itme details and other details and save the sale voucher
 Step 7 After saving voucher,in sales invoice print also you can check,it will show reverse charge in header as yes
 Note:When RCM in sale invoice is used,it doesnot calculate tax and is only to show sales invoice as rcm invoice as shown in sale invoice print also