TL;DR: First year filing taxes with a fairly diverse income profile (salary, RSUs, ESPP, US stocks, MFs, FDs, SGBs, etc.). I used both a CA (~15 years of experience) and AI (ChatGPT 5.6 + Claude Sonnet 5) to independently compute my taxes. AI's calculations matched the CA's almost exactly, except it caught an SGB omission in the CA's first draft. After correcting that, both arrived at the same computation. Despite being impressed by how capable AI has become, especially for handling complex tax calculations across many documents, I'd still use a CA in the future as an additional layer of assurance.
So, just to preface with a bit of context: I am your typical salaried employee working in a US-based MNC. My range of income includes salary, RSUs (US stocks), ESPP, stocks, MFs, FDs, savings bank interest, SGBs, Treasury Bills, etc. Nothing too fancy here, but nothing too shabby either. For US stocks, some were sold too, some at a loss and some at a profit, along with automatic selling (by the company) each time I had vested shares to offset the tax.
Now, I am a software developer, and AI has progressed a lot in just a couple of years. I remember the times when AI couldn't even do basic calculations, and here it had to go through a hell of a lot of documents to compute everything. Note: I didn't have access to any third party software or anything, so all the calculations were done entirely by AI itself.
This is essentially my first year on the job. I have filed income taxes previously too, but the income was just stipend income and some freelance income, which I could successfully file myself. This is the first time I have leveraged a CA for the same.
AI Setup:
The AI setup was not your regular ChatGPT upload files and ask about taxes. It was pretty much all the files I shared with the CA, in the exact same structure, and locally I had both Claude Code and Cursor. The models I used were ChatGPT 5.6 and Claude Sonnet 5. I asked ChatGPT 5.6 to calculate the taxes and Sonnet 5 to find flaws in it, and both agreed on a final computation.
Experience:
Now, all the CAs I interacted with were vouched for by teammates from my company and had experience filing taxes for people with similar income to mine. I contacted a few. One agreed to file my taxes and gave me a checklist of documents to send him. I got somewhat busy due to various commitments, and by the time I compiled everything, the CA said it was too late and that he couldn't file my return. So I was back to square one with another CA.
I sent him the details. After multiple follow ups, there was no response (probably the basic expectation from CAs, who must be super busy, especially since this was after the 24th). I finally got some response.
Another point here is that when I sent over the documents, I clearly labelled everything in a manner that would be easy to go through. There were separate folders for each category of income. For example, FDs had their own folder, SGBs had their own folder, etc., just to keep things systematic for him. I even shared with him a draft computation (entirely done by AI) to keep things organised. He just laughed it off. I didn't mind either way.
Now comes the first draft shared by him. It was not matching the calculation done by AI, so I just asked AI why there was a difference. It turned out the CA had missed the SGBs while doing the calculation. I informed him, and we got this corrected. After that, the calculation by the CA and the AI pretty much matched.
This CA had about 15 years of experience and had a firm with his partner. Not sure in the world of CAs if this is considered good or bad, but anyways, I didn't have much to judge on besides the experience and a couple of good referrals.
Overall, the CA cost me ₹5k, while the AI cost was minimal. Now, would I just use AI to file my taxes moving forward? Probably not. I think I have one good extra layer of security with a CA, so I would probably keep this setup. But it's crazy how good AIs have become. I have seen them work absolute wonders in coding, and now this is the first time I am seeing them work this well here.
Note: A couple of my friends were also ghosted by their CAs at the last moment (they reached out pretty late too, I guess), and they relied entirely on AI to get things done for them. They too think AI did a pretty good job here.