Welcome the Community @Lb06.
I'll be happy to help you locate your archived tax forms.
Your tax forms will be located on the Taxes tab of QuickBooks Online. It sounds like you've already checked there and the forms are not showing up for you.
You can PM me your email address, as well as which tax forms are needed, and I'll email them to you. Or contact support here, if you prefer.
I look forward to hearing from you so I can ensure this gets resolved.