After Submit how can we link sales invoice in payment entry?

After Submit how can we link sales invoice in payment entry ?

Sales Invoice has the option to create a Payment Entry. Ref document for detailed information

https://docs.erpnext.com/docs/user/manual/en/accounts/payment-entry

If the sales invoice and payment aren’t linked, use Payment Reconciliation: https://docs.erpnext.com/docs/user/manual/en/accounts/payment-reconciliation