Notice timeline tracker: CP05, CP12, CP21, 4464C, 5071C and review letters

[IRSContactTips]

Use this thread to compare notice dates, wording, and next steps without posting private letter images.

What this guide covers

• CP05 and review letters generally need patience unless the letter asks for documents or a response.
• CP12 and CP21 notices usually involve an IRS adjustment. Compare the notice explanation with your filed return.
• 5071C and similar identity letters require verification through the official path listed by the IRS.
• Letter deadlines matter. Community patterns do not replace the instructions in your notice.

How to use this thread

• Post the notice type, date on notice, general issue category, and whether a response is requested.
• Do not upload the full letter or visible control numbers.
• If a deadline is close, contact the official phone number or a qualified tax professional.

Official/source links

• IRS identity verification service
• IRS identity theft letters

RefundHub is an independent taxpayer-to-taxpayer community. This thread is informational and is not IRS, legal, tax, or financial advice.