What is the Payer TIN for the Defense Finance and Accounting Service? The one on the 1099-R is an 8-digit number and not the required 9-digit number.

https://www.dfas.mil/retiredmilitary/manage/taxes/#:~:text=Note%3A%202020%20Retiree%20IRS%201099,We%20apologize%20for%20the%20inconvenience.

What number do you have?  Is the last digit missing?  They sent out corrected 1099Rs.  Didn't you get one?

See this post.   Looks like the number should be 34-0727612
https://ttlc.intuit.com/community/after-you-file/discussion/defense-accounting-finance-service-1099-r-fin-number-missing-last-digit-error/01/1848339