Retirement tax questions

Thanks for the reply Karen. The dual tax filing does seem to be a lot complicated. Can i  choose to file for full year as resident using turbo tax??I was trying to do that earlier by showing foreign income under the "foreign earned income and exclusion" tab for the whole year post April. It also gave an option to try exclusion of foreign income based on physical presence test for which i do qualify as i am out of US for a full year now. Is that the correct way to do it??

Also, how do i calculate foreign tax credit and where do i need to show it while filing? Kindly let me know, thanks.