WHERE can i get five-digit Self-Select PIN as first time filing tax online (mailed in tax last year as newcomer in USA),

First time file tax online (mailed in tax forms last year as newcomer in USA), WHERE can i get five-digit Self-Select PIN? 

I got rejected a few times trying to e file thru turbotax, the tax forms are all filled correctly because I passed all warnings and smart check. The rejected code is 'IND-031-04 - The primary taxpayer's AGI or Self-select PIN from last year does not match IRS records.'

Double checked AGI of last year at IRS website, the amount filled is absolutely correct. I created my own five digit self select PIN because i never had the code before. (it's my first time e file online, last year mailed in my tax file as a newcomer in USA).  

Can anyone help with this? Many thanks.