When you file your tax return using TurboTax, the program doesn't keep a copy of your W-2. Instead, the program uses the information you entered from your W-2 to calculate your final numbers. See the TurboTax FAQ below for accessing a copy of a W-2.
If the PDF download for tax year 2018 is giving you an error on the Tax Home web page then use Print Center and request all worksheets.
TurboTax does not have a copy of the W-2 or Form 1099. It would have W-2 and Form 1099 worksheets that included the tax data from the forms that were entered. The worksheets would be included in the PDF of the tax return in the tax year the return was completed.
Copies of a Form 1099 would have to obtained from the issuer of the form.
When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state. See screenshot
This will take you back to the 2018 online tax return.
Click on Tax Tools on the left side of the online program screen. Then click on Print Center. Then click on Print, save or preview this year's return. Choose the option Include government and TurboTax worksheets
If you cannot obtain the W-2 from your employer, then for a fee you can get a complete copy of a W-2 from the Social Security Administration - https://faq.ssa.gov/en-us/Topic/article/KA-02501
You can get a free Wage and Income transcript from the IRS - https://www.irs.gov/individuals/get-transcript
For a fee of $50 you can get a complete federal tax return to include copies of W-2's, if you mailed the tax return and included a paper W-2, from the IRS by completing Form 4506 - http://www.irs.gov/pub/irs-pdf/f4506.pdf
See this IRS Tax Topic - http://www.irs.gov/taxtopics/tc159.html