Please see the information regarding the 6331C letter per the IRS below:
What happens after I successfully verify?
"If we successfully verify your identity, we’ll process your tax return. It will take up to 9 weeks to receive your refund or credit any overpayment to your account. However, if we find other problems, we’ll contact you again. This will delay your refund more."
For more information, please see the link below:
Understanding Your Letter 5071C or 6331C | Internal ...
