I keep getting payment reversed when I try to purchase the software to file for year 2023. How do I fix that when the billing info and card information is correct?

Are you using this TurboTax website for the prior year desktop software - https://turbotax.intuit.com/personal-taxes/past-years-products/

If so, you will have to contact TurboTax support for assistance with this problem. Use the key words Billing Issue

See this TurboTax support FAQ for contacting support - https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/turbotax-phone-number/L0Od33nMQ_US_en_US?uid=lfgviwbm