What is the 2023 Limit to contributing to both ROTH 401(k) and regular ROTH IRA?

Turbo Tax says that I contributed too much in 2023 to my ROTH accounts. I have a workplace ROTH 401(k) as well as a regular ROTH IRA. I contributed a total of $6,800 in 2023 but TurboTax says I can only contribute $6,500. I thought I could contribute to both. I make less than $100k. What am I missing? Thanks!