Single filer having modified adjusted gross income less than $135,000, has employer sponsored program 401k IRA (not Roth 401k), where contribution was made $20,449.13, Is the contribution $6,500 can be contributed to Roth IRA (or Is he/she is eligible to contribute another $6,500 into Roth IRA) for year 2023 as he/she is below 50 years old? Needs this answer rather than general IRS publication referral.
