Important note: This works for distributing ETFs (such as the VT and most if not all U.S.-domiciled ETFs).
For accumulating ETFs, IBKR would not list the “virtual” taxable income according to ICTax, so one might risk underreporting - unless you adjust or report separately.
No new info really. But I just stumbled over it, since this year is the first I’m just copying the income values (due to having switched my base currency to CHF) and not calculating income manually. (I actually had one accumulating ETF but sold before the tax “payable” date in ICTax).