I wouldn't recommend calculating the percentage on straight income because you get all sorts of deductions, it's rare for that to be close. You can use a turbotax account to just enter it and update the state to see. States typically have similar leeway as to the federal - so if you've paid in 100% of last years state "total tax" (or 115% if income over 150k), then there's often no penalty. I agree with the other recommendation, if you search your state site you can find some info, but there's not enough information provided to say. You can run the calc in turbotax, even just with estimates, update the state and see where you're at. TurboTax will handle the penalty and tell you if it applies.
