You need to send in proof that you live and work on tribal land to exempt your tribal income from taxation. This would include a copy of your tribal membership card and documentation proving where you live and work, such as a deed for your house and the building where you work. Here is what it says in the Oklahoma tax return instructions:
![](https://lithium-response-prod.s3.us-west-2.amazonaws.com/turbotax.response.lithium.com/RESPONSEIMAGE/a667fe3a-8b7a-4686-91b5-7d492fd2d270.default.png)
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