Why is my backdoor Roth conversion being taxed? I thought it was post-tax contribution.
In 2022 I opened a backdoor Roth with Schwab. I deposited $6000 of post-tax money into a traditional IRA and then converted all of it to a backdoor Roth. Later my broker deposited $100 into my Traditional IRA account as a reward for opening an account, so I went ahead and converted that as well. So I expected to pay taxes on the $100 overconversion. Now I received a 1099R with box 1 (gross distribution) $6100 , box 2a Taxable amount $6100. After entering these values in TT my tax burden increased almost $2000. I believe there's something wrong here since this is supposed to be post-tax money contributed.
Can someone please help clarify.