Deductions & credits

This is the first year, my foreign tax credit is more than $1000, so I need to choose "Simplified  Foreign Tax Limitation" .  Once I choose this, I can't file my tax online.   I don't need to pay any ATM. Should I still  select the Simplified Foreign Tax Limitation  or I can just choose the Non-Simplified AMT and wait until I need to pay ATM ( unlikely)? 

 

Going forward, I will receive Pension income from Canada every year, so I will expect my FTC around $1000 each year.  In my case, should I choose the Simplified foreign tax limitation or Non-Simplified AMT?  

 

Thanks.