Letter could be for a number of reasons. Did you have any outstanding obligations that could be causing a refund offset? Could be a CP2000 matching notice for 2019/2018. There are a number of reasons you could be receiving the notice. If you purchase the Premium Services bundle for CA residents? If you did, you are covered from notice and audit questions through TaxAudit.com. Here is link to notice help to assist you with your IRS correspondence.
