How to claim contribution to Traditional IRA account is non-taxable?

Hello everyone: 

I listed information below for reference purpose:

  • Residental state: Texas
  • Year 2020 Tax Filing status: Married file jointly
  • Year 2020 AGI: $139,428
  • Turbox Tax showed effective tax rate as: 10.10%
  • My contribution to Traditional IRA Account (Vanguard): $4,900
  • Nondeductible traditional IRA contributions from worksheet: $4,900 (data from IRA Contribution Worksheet)

 

  1. What document(s) I need to file with IRS to notify them that my traditional IRA contribution in year 2020 is after-tax dollar contribution, so they don't tax my again when I withdraw the funds during my retirement years.
  2. What process I need to go through (such as filing paperwork with IRS or hiring an accountant to do the work for me) in order to claim $4900 is non-taxable with IRA?
  3. Should I convert $4900 contribution into a Roth IRA account since it is non-taxable?
  4. If the conversation process is very complicated then I may choose to leave the money in the Traditional IRA account
  5. Please advise what action shall I take to avoid this situation in the future (e.g. make contribution go to a ROTH IRA account instead of going to a traditional IRA account)?