Advanced Child Tax Credit Payments (ACTC)

I went to IRS Portal and declined ACTC payments but received them anyway. We aren't claiming our granddaughter in 2021due to her returning to her mother. However, I received them so sent them back per instructions in Topic O: Returning a Payment. Now I've received IRS Letter 6419 that shows I received payments but no mention of my returning them. Where should I put that information? Turbo Tax forces me to payback a second time by lowering my return amount.