Retirement tax questions

I'm confused where your assumption comes from, because my tax document from 2020 makes zero mention of the taxes taken from the withdrawal. The only thing shown on my 2020 documents is the total amount of the withdrawal and the taxable amount after being divided by 3.

There is absolutely nothing in my filing, nothing on the 8915-E, nor the questions I had answered on TurboTax that acknowledge the $6,003. The 1099-R clearly has the taxes withheld listed in their proper boxes. I entered all this information into the system when I filed (unless, of course, TurboTax didn't ask about the boxes listing the Federal Taxes Withheld and State Taxes Withheld boxes). Either way, I am being double taxed. If I am incorrect, please specify how having taxes withheld upon withdrawal and then being taxed again upon filing isn't being double taxed. I know tax code is complicated, but that seems pretty straightforward to me.

Edit: I was typing this up before I noticed your response, @rjs. I still do not understand how that is the case considering the amount is not mentioned on the filing documents. Not the $3,335 that was the Federal Withholding portion, not the $2,668 that was the State Withholding portion, and not the total $6,003 between the two.