[seeknotfind]

I would not recommend calling the IRS based on phone numbers you see on GitHub, though they may be correct sometimes.

[armada651]

Just google the phone number to confirm it's correct, takes about 5 seconds.

[Terr_]

"It's the top sponsored result, that automatically means it's legit." :p

[seeknotfind]

I would also not recommend calling the IRS based on mutable files on GitHub that are verified by people on HN. Though they may be correct sometimes.

[instagib]

The IRS changes the call route also. Whoever you used last year usually has a service number to call or faq to get the latest instructions.