If you are renting property in Mexico and not paying taxes read the rules http://rentaltaxmexico.com/
If you are working and earning money in Mexico read the tax rules at: https://home.kpmg.com/xx/en/home/insights/2011/12/mexico-income-tax.html
If you need help with your US taxes while in Mexico contact us at firstname.lastname@example.org Remember, you must still file a US tax return on your worldwide income even though you are paying taxes in Mexico. You do get exclusions and credits for taxes you already paid in Mexico. The statute of limitations never expires for the IRS to assess and collect taxes against your worldwide income if you fail to file a US tax return when you are required to file.