My wife and I are both sole proprietors. We file a joint Federal return that includes two Schedule Cs; one for each of us. How do we complete the Form 511-BAT for the Business Activity Tax?When filing a joint return and both spouses are doing business in Oklahoma, complete one Form 511-BAT. All the business activity, for each business, is combined on one Form 511-BAT. When completing the top section of the form, enter the name, social security number and NAICS Code for the primary Schedule C; this should be the Schedule with the most revenue.
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