Can I make traditional IRA contribution before 4/15 for prior year's tax and after 4/15 withdraw the same for this year's, if the tax rates are expected to be different?

[macuser_22]

The problem with tagging onto an old post is that most users here that answer questions here look for new questions without previous answers.   Two year old posts that already have an answer will be ignored by most.   Most such users use filters to search for unanswered or recent questions so if you want to have the most attention given to your question it is best to start a new thread with a new question.