Retirement tax questions

You mentioned “The proper way to report the recharacterization and earnings which is to enter the 2018 Roth IRA contribution in the IRA contribution interview section”. Can you please clarify where I can report the recharacterization? Did you mean the tax filing for 2019 or the amendment for 2018? If it’s the amendment for 2018, can you please let me know where on TurboTax can I start the amendment? Thank you.