iTunes won't let me sign in even though apple id and password are both correct

Hey qj1,

Thank you for using Apple Support Communities!

I understand from your post that your computer is repeatedly asking you to sign in with your Apple ID. I'd like to look into this with you.

I would recommend you use the steps in the following article:

If iTunes repeatedly prompts you to authorize your computer

Let us know if this helps.

Cheers!

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tt2