That reject code means the primary social security number has already filed a return for this tax year.
Please check what you entered.
If your return is rejected with IRS rejection code R0000-902-01, the Taxpayer Identification Number (TIN) for the primary taxpayer has already been used on a return filed with the IRS. In most cases, the taxpayer's social security number (SSN) was entered incorrectly.
Is your Social Security correct on your tax return?
Do you know if someone else may have entered you on their tax return as a dependent?
Can you confirm if the extension filing can be rejected in the event that a payment has been completed on the IRS DirectPay site for the extension, prior to filing the extension form through TurboTax?