Why would IRS twice accept my extension filing and twice reject it with this explanation: Your 2023 Federal Personal Extension has been rejected

[glarsson]

REASON: R0000-902-01 - Taxpayer TIN in the Return Header must not be the same as a TIN of a previously accepted electronic return for the return type and tax period indicated in the tax return.

[bnswight]

Double check your SS#.   I hope this helps.

[PaulaM]

If it doesn't get accepted again, there's still time. See this FAQ for reference.

File federal extension online here. 

State extensions can be found here if needed.