It seems like the IRS is making a lot of errors lately, perhaps due to the learning curve for new employees. The response you got from the IRS makes no sense. Form 8606 is for IRAs and has nothing to do with pensions an annuities; you reported no change related to pensions and annuities. Nothing about reporting a nondeductible traditional IRA contribution could increase income tax liability.
$1,826 is suspiciously exactly equal to 22% of $8,300. If this amount of additional income would have fallen in the 22% tax bracket, that might shed light on something entirely unrelated to Form 8606. Pension an annuity distributions are reported on 2021 Form 1040 line 5a/b.
The recharacterization had nothing to do with a Roth conversion, so it would have been better if your explanation of the recharacterization made no mention of a Roth conversion or anything about your 2022 tax return.
