Converting non-deductible IRA contribution to Roth IRA

I opened a traditional IRA Account in 2019 and made a $3000 after-tax contribution.  In reality I wanted to get a Roth IRA because I already had a employer sponsor 401k but I wasn't well informed. I make over the income limit to qualify for deductible contributions to a traditional IRA. I filed my 2019 taxes and Turbo Tax created a 8086 for non-deductible IRA contribution. I haven't made any others contributions to that account.

 

I want to transfer/convert those funds to a Roth IRA account now.

What is the best way to do this?

How do I report this on the 2020 tax return?