I live in oklahoma and work in texas

[old_curly_wolf]

I need to deduct my living expenses in Texas and the per Diem meal rate.

[DDollar]

If Texas is your regular place of work (as opposed to a temporary assignment) you cannot deduct your living expenses.  If it is a temporary assignment you can deduct them, as unreimbursed business expenses.  An assignment or job in a single location is considered indefinite if it is realistically expected to last for more than 1 year, whether or not it actually lasts for more than 1 year.

For more information see Chapter 1 of IRS PUB 463 Travel, Entertainment, Gift and Car Expenses