Can someone explain what my options are for filling taxes if turbo tax is asking for last years PIN? I don't remember that and I don't remember last years return.

You should have an option to use last year's AGI.  

To locate your Adjusted Gross Income AGI from last year, please follow these instructions:

If you have filed your last year 2018 tax return and have a copy of the tax forms, you may locate the amounts on line 7 on your 2018 Form 1040 or line 35 on 2018 Form 1040-NR if applies to you.

If you used TurboTax online to file, you can access your account here Login and download a copy of your prior year’s 1040 tax return to find your AGI.  Click here for instructions: Prior year's return

If you do not have a copy of the tax forms, you may order a transcript from the IRS.  Click here Get  Transcript and select  "Get Transcript Online "  On the transcript, look under section "Adjustment to Income" and find the amount for Adjusted Gross Income.

Please also see link https://ttlc.intuit.com/community/taxes/discussion/i-can-t-remember-last-years-pin/00/1122564

@ avaloncrutch

pin could be for state return.  many states allow you to go to their website and lookup your pin.  joint return each has a pin 

Although TurboTax doesn't seem to want you to know it, if used TurboTax last year and selected a five digit PIN,  and imported your last return before starting, the five digit PIN is available.

It's a good idea to make a note of it your self and keep it safe

If you don't have the PIN and you have to mail it in, you won't get to select a PIN this time either.

If you use the PIN make sure AGI is cleared (not zero).