Can anybody guide me how to deal with RSU situation where Tax was withheld, as well as all remaining RSUs I sold in same tax year 2018. Broker - Etrade

I need help for my RSU tax withheld and rsu sale.  

What I need to do for following case -   In 2018, I  received 50  RSUs. 12 were automatically sold as Tax Withheld. Remaining 38 I sold in the same year (2018). My brokerage account is Etrade. After I imported my tax information into Turbotax, suddenly it started showing me huge taxes (while already taxes were withheld for those 50 RSUs). Can anybody guide me how to deal with this situation? (i.e. Tax withheld on RSUs, as well as all remaining RSUs sold in same tax year).