I have lived in Okla 3/1 - 12/31/2019, Texas (no state income tax) prior to that. On 511NR, it calculates the Oklahoma Source income correctly but then uses the Federal Amount of Adj Gross Income to determine the income on which to pay Oklahoma state taxes. This Federal Amount includes the wages that were earned prior to 3/1 in Texas which of course did not have state taxes withheld. Is this correct? Why should I have to pay Oklahoma state income tax on wages earned in Texas during Jan/Feb?