US Permanent Card Expired, but has a letter extension and want to visit Canada

[laveennd]

Hello,

I am in the process of reapplying for US green card, but I have a trip coming up to visit Canada for few days. I have the letter to extend my green card for 1 year (in case to travel anywhere). How do I apply for the ETA (electronic visa) online? My green card is currently expired, but I have the letter to travel.

Please advise and I appreciate your help.

Thanks,

Thao

 

[scylla]

What passport do you hold? Which country?