Foreign tax credit

We worked abroad and earned income from foreign employer. In our 2018 tax return, we took foreign earned income exclusion to reduce our adjusted gross income. Now we might need to amend our 2018 tax return and report more income as well as foreign tax paid. We think we will benefit more by taking foreign tax credit. Our question is how we can switch from foreign earned income exclusion to foreign tax credit while we are using Turbo Tax to amend our 2018 tax return?