It's nice to have you here in the Community, @NPaz.
Let me share some insight about the option to mark it as billable to a particular customer upon entering a bill in QuickBooks Online (QBO).
In QBO Simple Start version, you can enter bills, but you can't mark them as billable to a specific customer. This feature is only available in QBO Essentials and Plus Versions. If you want this feature, I suggest you upgrade your subscription to either Essentials or Plus.
To upgrade your subscription, follow these steps:
At the upper right corner, select Settings, then click Subscriptions and Billing.
Make sure your payment info is up to date.
In the QBO section, select Upgrade your plan.
Review the available plans, and then select Choose Plan.
If you have any additional questions about bills or billable, the Community Team is always ready to assist you. We're happy to have you here today, Npaz.
Need QuickBooks guidance?
Log in to access expert advice and community support instantly.