Why the dates on this page are ranges
IRS Master File posts on a weekly cycle. Transactions that fail a validity check "unpost" and go to a tax examiner; ones that depend on another transaction "resequence" and wait. Neither generates a letter, and the IRM gives the timing only as ranges: "When URC 8 is input, it can take 4 to 6 weeks for the unpostable to post to the Master File" (IRM 3.12.279.17.2); resequencing "may delay posting from 1 to 11 weeks, depending on the master file" (IRM 3.12.279.5.8); a paper document is requested from Files with a second request after "15 workdays (21 calendar days)" and a third 15 workdays later (IRM 3.12.279.6). Entity changes have their own clocks: a new EIN takes "approximately two weeks" to reach Master File (IRM 21.7.13.2.7); name changes post on the weekly cycle after the examiner inputs them; a Letter 147C is expected in 10 to 14 business days and is not re-sent within 30 days of the EIN being assigned or a prior 147C (IRM 21.7.13.3.9.1).
What to do while you wait
- Do not file the same thing twice. A duplicate transaction resequences behind the first or unposts as a duplicate and is voided (IRM 3.12.279.6.1). A second Form SS-4 for the same entity creates the mixed-entity problem the identity theft unit spends its time untangling.
- If a filing deadline falls inside the window, file under the information you have and correct later. Information returns filed under an EIN that has not posted yet unpost on the Payer Master File as UPC 501 and are worked from July to November of the processing year (IRM 3.12.279.112).
- After eight weeks, an open unpostable can be referred on Form 4442 through a practitioner or an IRS assistor, and the referral must be answered within 20 days (IRM 3.12.279.17.1). Before eight weeks the referral is not accepted.
- A transcript will show a pending transaction as "PN" and an unpostable as "UN" with the unpostable code; that is the only way to see where a change is in the queue.