I can help you on how to accept all bank transactions under Business type, naisanza.
If you import the transactions manually, you'll need to categorize per transaction under Business type. However, if you connected your bank account to QBSE, you can use a rule to accept automatically all new transactions from your bank as Business.
For more details about using rules, you can check out the Use rules to speed up reviewing and categorizing transactions article.
I have a link here that contains articles about managing your banking transactions: https://community.intuit.com/browse/quickbooks-self-employed-banking-and-transactions.
Please reply to this post if you need anything else with Online banking. I'm always here to help.