Where do I find our AGI? The state portion is asking for it.

To find your AGI for 2018, please see this TurboTax Help article:  How do I find last year’s AGI?

The AGI on your 2019 1040 is on line 8b.

check this error

schedule c  form 8829  line b of line 8 smast weeks must be entered

where do i find this?

You can get a copy of your 2018 tax return, from TurboTax it will have your AGI.  Follow these steps to get a copy of your prior-year tax return.

Sign in to TurboTax making sure you're using the same TurboTax account (with the same username) as in prior years.

1. Select Documents from the navigation when it appears.
2. Use the drop-down menu at the top of the screen to choose the tax year you want and then select Download PDF. 

This link  How do I access a prior year return? has additional information that you may find useful