In México if you are an average employee earning less than around $50000 usd (I.e. most workers), your employer can "do" your taxes (very simple, they report what they have withheld from you).
If you have some amounts you want to regain from losses, etc., you can still do your taxes manually.
That means logging into the free MEX IRS platform, which shows all your tax info preffilled. Most likely the stuff you want to input is already there (all invoices in mexico are signed by private/public keys through the IRS system).
So you just enter your bank account to get your money back. Or get your reference to pay your taxes.
The system is really beautiful.