We are moving old software to this software. where we need customer opening balance as debit also.
I read it. so, I write the “needs” word.
You can’t do that. Read the Guide
Customer opening Debit balances are recorded by entering the unpaid invoices that make up the opening balance. These invoices must be entered with a date prior to the date you started using Manage.io
See the guide referenced by @Syed_Salman_Ali under the heading “Enter unpaid sales invoices”