Will I owe taxes to Oklahoma if I reside in Texas, and my employer is in Texas, but plan to temporarily work remotely in Oklahoma for less than 60 consecutive days?

[nthnd99]

See Title.

Essentially I am getting in married in January 2021. My (wife) will finish grad school in Oklahoma in May, but doesn't need to return to finish classes until early March because she is doing external clinicals in Texas.

I was planning to stay with her in Oklahoma from March-May, while working remotely for my company in Texas. I also reside in Texas. I know normally residency takes precedence but I got a notice from my work that I need to supply an 'alternate work address' if I plan to working remotely across state lines for more than 60 consecutive days. The FAQ for this notice says that I should be aware this could potentially have tax implications should I break this 60 day rule and have need to file this alternate work address form.

Do I have anything to worry about?

[Hal_Al]

"Every nonresident with Oklahoma source gross income of $1,000 or more is required to file an Oklahoma income tax return".  Reference: https://www.ok.gov/tax/documents/511NRPkt-18.pdf Note: there's no 60 day requirement, only the $1000 income.

The wages you earn, telecommuting from OK, are OK source income, for the $1000 threshold. 

The "60 day  alternate address"  is probably an employer "thing" and has nothing to do with your requirement to file an OK return and pay OK income tax.  It may be an OK employer withholding requirement. You'll have to ask them.