i guess because i used a different Appel account when i downloaded notability and I can’t remember it.
For you 'different' Apple ID:
1.
Depending on what you did with your 'different' Apple ID.
If you have deleted it, it is no longer valid, it simply no longer exists and it no longer works.
To understand about a deleted Apple ID, see the Apple articles below:
How to delete your Apple ID account
How to delete your Apple ID account – Apple Support (UK)
-> Once your account has been deleted, Apple can't reopen or reactivate your account or restore your data.
Understand and control the personal information that you store with Apple
Understand and control the personal information that you store with Apple - Apple Support
2.
If you've ever requested to deactivate that 'different' Apple ID, see -> How to deactivate your Apple ID account
How to deactivate your Apple ID account – Apple Support (UK)
⤵️
Scroll to -> How to temporarily deactivate your Apple ID
Sign in to your Apple ID account page on a Mac, PC, iPhone, or iPad. Then scroll down to Data and Privacy, and select "Manage your Data and Privacy." On the following page, select "Get started" under "Deactivate your account." If you don’t see this option, it means that this feature is not available in your country or region.
👉 When you request to deactivate your account, you receive a unique alphanumeric access code. Make sure that you keep this access code in a safe place—you must have it to reactivate your account.
If you forgot the access code, try to contact Apple Support -> Get Support (apple.com)
3.
If you still know that 'different' Apple ID, check your Apple ID via your email box -> Check your Apple ID via your email box, see this Apple article: If you forgot your Apple ID
If you forgot your Apple ID email address or phone number - Apple Support
OR see -> Having trouble signing in?
https://iforgot.apple.com/password/verify/appleid
See -> If you can't connect or sign in to iCloud
If you can't connect or sign in to iCloud - Apple Support
See this Apple article: If you forgot your Apple ID password
If you forgot your Apple ID password - Apple Support
Then see this Apple article: What to do after you change your Apple ID or password
What to do after you change your Apple ID or password - Apple Support
