Annuities payment from an IRA account, form 1099-R

[mmfarrag02]

I received a 1099-R from annuities payment, the box # 1 is the same amount in box #2. However, box # 2B is marked as " Taxable amount not determined"

How I can calculate the taxable amount ?? Please advise.

[dmertz · Accepted solution]

Unless you have basis in nondeductible traditional IRA contributions, the entire amount is taxable.  If you do have basis in nondeductible traditional IRA contributions previously reported on a Form 8606, the taxable amount of your 2025 distribution is determined on Part I of your 2025 Form 8606.