Form I-9
https://www.uscis.gov/system/files_force/files/form/i-9.pdf?download=1
2018 IRS Publication 15
https://www.irs.gov/pub/irs-pdf/p15.pdf
2018 IRS Form W-4
https://www.irs.gov/pub/irs-pdf/fw4.pdf
Texas Comptroller 2018 Due Dates
https://comptroller.texas.gov/taxes/file-pay/due-dates.php