2021??? Only 2022 forms would likely be available for "direct" import into tax software now.
Most financial providers take down the ability to directly import those forms by October of the tax filing period. For 2021 taxes, that would have been sometime in October of 2022 (though some take their downloads out earlier)
___________
TD Ameritrade probably does have your 2021 Consolidated 1099-B forms as a PDF file within your account that you can download separately as a file on yoru computer...but the tax import file is formatted entirely differently, and that special import file is likely no longer available.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
