What kind of problems can employment-based nonimmigrants (H-1, L-1, E-1, E-2, E-3, TN) face during reentry?
I think this question is most relevant for H-1 holders, but other employment-based nonimmigrants may also note the general principles here.
The following FAQ should cover the issues.
Q. I am a US Citizen. My parents (or spouse/spouse-to-be) are in USA on visitors visa. Can I apply for their green card? How does it all work?
Fee schedule for TN classification (USCIS requires all filing fees to be paid EITHER via ACH Transaction or Credit card)
Note: USCIS to Increase Premium Processing Fees as of March 1, 2026, https://www.uscis.gov/newsroom/alerts/uscis-to-increase-premium-process…