File amended returns for years in a common law marriage?

My wife and I live in Texas where common law marriage is recognized.

In 2022 we "declared" and registered our "informal marriage" with the county. We began living together in January of 2009 and swore so on the recorded registration.

 

Question: Is it possible that we can file amended returns for the previous (three?) years as a married couple instead of as single, and expect the IRS to issue a refund for those years we "overpaid?"

 

I found this https://turbotax.intuit.com/tax-tips/irs-tax-return/how-to-change-your-tax-filing-status/L5yYux3qL but it doesn't address the likelihood that the IRS would accept the amended returns and issue a refund. 

 

Each year one of us filed by the April deadline, but the other filed for an extension to file in October because no tax was owed. How does that affect the three year rule?

 

We both used TurboTax to file. Assuming we decide to file amended returns, is there an "automated" process within TurboTax to amend and file them as MFJ?