Hi there, Meghob. On QuickBooks Sole Trader, you can categorize Owner Withdrawals by using the Business transaction type.
In this transaction type, there is an Owner’s Withdrawal category intended for tracking funds taken from your business for personal use.

However, I recommend consulting your accountant so they can assist you in categorizing this kind of transaction to ensure that your financial records comply with tax laws.
This thread remains open if you have additional inquiries about managing your transactions.