If your move to the U.S. was due to a change in your job or business location, or because you started a new job or business, you can deduct your reasonable moving expenses (not including any expenses for meals), if you meet all three of the following requirements:

• Your move closely relates to the start of work
• You meet the distance test
• You meet the time test

Move Related to Start of Work - Your move must closely relate both in time and in place to the start of work at your new location. You can consider moving expenses incurred within one year from the date you first reported to work at the new location as closely related in time to the start of work. A move generally relates closely in place if the distance from your new home to the new job location isn't more than the distance from your former home to the new job location. For exceptions to these requirements, see Publication 521, Moving Expenses.

The distance test - Your new workplace must be at least 50 miles farther from your old home than your old job location was from your old home. If you had no previous workplace, your new job location must be at least 50 miles from your old home.

The time test - If you're an employee, you must work full-time for at least 39 weeks during the first 12 months immediately following your arrival in the general area of your new job location. If you're self-employed, you must work full time for at least 39 weeks during the first 12 months and for a total of at least 78 weeks during the first 24 months immediately following your arrival in the general area of your new work location. 

For more information, please see IRS Tax Topic 455 - Moving Expenses:

https://www.irs.gov/taxtopics/tc455.html 

Please also see the TurboTax Guide to IRS Form 3903: Moving Expenses:

https://turbotax.intuit.com/tax-tools/tax-tips/General-Tax-Tips/Guide-to-IRS-Form-3903--Moving-Expen...