On my CO W-2 I have wages in Box1, but on my MO W-2 the box1 for wages is blank. How do I find out wages for that box?

I recently moved from CO to MO. My CO w-2 contains info in box1 for wages, but my MO w-2 does not have any wages entered in box1. The box is blank. However,  I need this information in order to finish filing. How do I get the number for that box?