Ass I have posted in another section, it has been historically correct (or commonplace) to allocate contributions made in the first 60 days of the year, e.g. Jan 1-Feb 28 2021 apply, in whole or in part, to the prior tax year 2020, or to the current tax year. That may no longer be the case (to be confirmed) but in this instance, just do a manual override as noted by TheTaxSmith to limit how much of the 2021 contribution applies to the 2020 tax year. I did this on a regular basis for some time (and ignored the UFile warning).