I married in 2018. We both itemized and deducted taxes in 2017. Do we manually enter combined 2017 refund info or adjust the refund/withholding amount for state refund?

We are not clear as to whether to we just adjust the amount for the state refund to include both of our refunds and withholding and then just leave the 2017 Federal Return Info reflecting only one spouse's information, or if combine refund info and our return info information together even though it looks like one single filer now has a much larger income. 

Thank you