How do I classify Roth conversions, ie, what line do I enter them on?

Since I have never done one, I assume, if I remove $20k from an IRA or a SEP/IRA and put it into a Roth/IRA, I then need to enter $20,000 into some income box on the spreadsheet.

Thanks.

OK, I need help, I put $12,000 into line 23 Taxable interest, non qualified dividends.

And I put varying numbers in LTCG (line 27) or Short term cap gain (line 26),

$20,000, $50,000, $100,000 and $1,000,000, but I can't generate any taxes due.

Here I'm assuming Line I67 is my tax due line.