Not sure if the "Used to" keep them further back, but right now, I only see back to 2021 even though I've used them a lot of years.
Perhaps, the storage costs were getting too high for a free service, so they only store back as far as the Tax software they support, which is also only back to 2021.
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Downlaod a copy of your yearly donations now, to keep on a backup USB flash drive, or print out and keep in a file folder. The 2021 data will probably be eliminated sometime this year...chopping of one older year, every year. as the years progress.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*