Retirement tax questions

I received four 2019 1099-Gs for amended state tax refunds, one each for tax year 2014, 2015, 2016, and 2017.  For some reason, I should have received a 5th 2019 1099-G, the one for a tax-year 2018 refund, but I DID receive the refund check.

 

I did not itemize my federal return or my state return in tax-year 2018, 2017, 2015, and 2014.  I itemized only in tax year 2016.

In Turbo Tax, I entered the tax year 2018 refund,  although I did not receive a 1099-G for it.  I indicated that I did not itemize in 2018.  That's the only time I was asked if I itemized.

I entered the 1099-G for 2016, the year in which I itemized, and the refund amount was counted as taxable income.   If I enter the 2019 1099-Gs for 2014, 2015, and 2017 -- years in which I did NOT itemize -- I am not asked whether I itemized in those years, and consequently the tax refund is counted as taxable income. 

The only way in which I can figure out how NOT to have those tax-year non-itemization refunds counted as taxable income is to NOT enter them at all. 

 

Am I doing this correctly?

Isn't the IRS going to know that these non-reported 1099-G refunds were received??